英:[eə(r) lein]
美:[er len]
英:[eə(r) lein]
美:[er len]
航空路线;
The first known use of air lane was in 1909
air pumpnoun
a pump for removing air from a closed space or for compressing air or forcing it through other equipment
air pocketnoun
a condition of the atmosphere that causes an airplane to drop suddenly
air massnoun
a body of air extending hundreds or thousands of miles sideways and sometimes as high as the stratosphere and having nearly the same conditions of temperature and humidity at any single level
air locknoun
an air space with two airtight doors that permits movement between two spaces with different pressures or different temperatures
air letternoun
an airmail letter
a sheet of airmail writing paper that can be folded and sealed with the message inside and the address outside
air lanenoun
a route followed by airplanes