英:[ˌreɪdiəʊˈæktɪv]
美:[ˌreɪdioʊˈæktɪv]
英:[ˌreɪdiəʊˈæktɪv]
美:[ˌreɪdioʊˈæktɪv]
ra·di·o·ac·tive
reI di o aek tihv
radioactively (adv.)
词根:radiator
n.radiation 辐射;发光;放射物
radiator 散热器;暖气片;辐射体
radioactivity 放射性;[核] 放射能力;[核] 放射现象
radiography [核] 放射线照相术;X光线照相术
radiobiology [生物物理] 放射生物学
radiocarbon [核] 放射性碳
radiochemistry [核] 放射化学
radiographer 放射线技师,X光照相师
radioimmunoassay 放射免疫检定法
adjective
of, caused by, or exhibiting radioactivity Radon is an odorless, colorless gas that arises naturally from the ground because of the decay of radioactive elements commonly found in rocks and many types of soil. In a chain of radioactive decay, uranium produces radium, which gives off radon, which in turn produces radioactive breakdown products that are harmful if inhaled.—Warren E. Leary
radioactive isotopes
so divisive or controversial as to require avoidance Almost all women—and therefore men—use a form of birth control at some point in their lives, yet contraception is so politically and legally radioactive that legislators and pharmaceutical companies avoid funding it.—Karen Weise Subsequent polling data show that the quota issue is perhaps the most powerful one in our politics … A House Democratic aide says, "The quota issue is radioactive." The result has been nothing less than panic in the Democratic ranks.—Elizabeth Drew
He has been deemed radioactive by most charitable organizations … and organized competition, even local stuff, is largely closed off to him.—Asher Price
radioactive waste放射性废弃物
radioactive isotope放射性同位素
radioactive material放射性物质;放射性材料
radioactive source[核子学]放射源
radioactive contamination放射性污染
radioactive decay[物]放射性衰变
radioactive element放射性元素
radioactive substance放射性物质
radioactive fallout放射性尘降物
radioactive tracer放射性示踪剂,放射性指示剂
radioactive waste management放射性废物管理
1898年,用于描述原子核“能够自发地发生核衰变并释放电离辐射”,源自法语 radio-actif,由皮埃尔和玛丽·居里创造,由拉丁语 radius “射线”(参见 radius)的组合形式 radio- 和 actif “活跃的”(参见 active)组成。用于描述过程等“涉及或由放射性产生”的用法,始于1903年。
放射性的,放射的:具有放射性特性的
International Scientific Vocabulary
The first known use of radioactive was in 1898
radioisotopenoun
a radioactive isotope
radiogramnoun
a message transmitted by radio
radio1 of 4noun
the sending or receiving of signals using electromagnetic waves without a connecting wireespecially: the use of these waves to carry sound that has been changed into electrical energy
radio includes television and radar
a radio receiving set
a transistor radio
the radio broadcasting industry
radio2 of 4adjective
of, relating to, or operated by radiant energy especially at radio frequencies
of, relating to, or used in radio or a radio
radio commercials
radio3 of 4verb
to communicate or send a message to by radio
radio-4 of 4combining form
radiant energy : radiation
radioactive
radioactive
radiocarbon
radiocarbonnoun
radioactive carbonespecially: carbon 14
radioactivitynoun
the giving off of rays of energy or particles by the breaking apart of atoms of certain elements (as uranium)
radioactiveadjective
of, caused by, or exhibiting radioactivity
radioactiveadjective
of, caused by, or exhibiting radioactivity
radioactive isotopes
1 Lawrence’s brusque four-paragraph letter reported deuteron-induced radioactivity in fourteen light elements and speculated brashly that “in these nuclear reactions new radioactive isotopes of many of the elements might be formed.”
2 She had often carried test tubes containing radioactive isotopes in her pocket, remarking on the pretty blue-green light they gave off.
她经常把装有放射性同位素的试管放在口袋里,对试管里发出的漂亮的蓝绿光赞不绝口。
3 The study concluded that the effect on Americans of radioactive emissions from nuclear tests was vastly outweighed by their exposure to diagnostic X-rays and other common sources.
4 “But you didn’t know the water was radioactive.”
5 Radioactive ray is material thing.
放射线是实际的物质。
6 They were exposed to radioactive fallout during nuclear weapons tests.
在核武器试验中他们暴露在放射性尘埃之下。
7 The subject boiled down to this: Could Seaborg devise a chemical process for separating element 94 from the stew of radioactive fission products in which it was mixed after the bombardment of uranium?
8 How do food products become radioactive?
食物产品如何才能具有放射性?
9 The one prospect of success lay with carbon-14, which was expected to be radioactive.
10 The government has been storing radioactive waste at Fernald for 50 years.
政府在弗纳德存放放射性废料已达50年之久。
11 Such souls are radioactive in nature.
这样的灵魂本质是放射性的.
12 When they ceased the bombardments, however, the emissions continued in the same pattern as one would expect from a naturally occurring radioactive isotope.
13 They needed clear skies to get a good look at the explosion, but far more worrisome was the danger of spreading radioactive fallout.
14 We had to go into the test zone to check highly radioactive instruments.
我们需要进入试验区检查高放射性的设备.
15 Tritium is one of the mildest radioactive isotopes.
氚是最和缓的放射性同位素之一.
16 Bits of it, like the radioactive dust itself, whirled down on Rick.
17 At night the ruined city gave off a radioactive glow which could be seen for miles.
18 The equation involved a certain amount of fanciful math, but there was no disputing that the cyclotron was beginning to pay its way as a producer of radioactive isotopes on an industrial scale.
19 Hanging at his side, the sceptre of Diocletian glowed angry purple, like a radioactive bruise.
20 The radioactive element used in the core was solinium 2, which had a half-life of fourteen seconds.