libration

1 The stifling heat, Luke learned, too, that every ninth day, with what they called the libration of Vulcan, there came an equal period of raw and biting cold to replace the heat.

2 Cause of librations.—That the moon should librate is by no means so remarkable a fact as that it should at all times turn very nearly the same face toward the earth.

3 It is flanked E. and W. by other large enclosures, which can only be seen to advantage when libration is favourable.

4 Her varying angular velocity, and consequent libration in longitude.

5 The gibbous Earth hung high above the horizon, motionless, save for the invisible pendulum sway over the tiny arc, of its libration: widening to quadrature, casting upon the bleak naked Lunar landscape its mellow Earth-glow.

6 The current libration amplitude is 125°, with a period of about 660 years.

7 First comes a research into the libration of the moon.

8 Such libration could be explained in one of two ways: either Mimas had an extremely elongated core, shaped like a flattened football; or it had a global ocean below its surface.

9 But it is only an insignificant margin of the far side of the moon which this libration permits us to examine.

10 Especially, the author researches the coupling libration of water and dam detailedly.

特别对库水与坝体耦合振动问题进行了详细的阐述。

11 A new paper by the same team, however, published today in Nature, closely studied how the libration changes the orbit of Mimas—and establishes that the moon indeed has a subsurface ocean.

12 A remarkable ray-system, but one which is only well seen when libration is favourable.

13 The discovery pivots on the detection of a curious libration—a wobble—in the rotation of Mimas.

14 The subject of the lunar librations was treated by Lagrange with great originality in an essay crowned by the Paris Lagrange.

15 The inclination of her axis to the plane of her orbit, and her consequent libration in latitude.

16 Varying regularity of libration period on overweighted compound pendulum was obtained by theoretical reasoning? Research and analysis.

通过理论推导、研究和分析，得出了加配重复摆振动周期的变化规律。

17 The accompanying map, eighteen inches in diameter, represents the moon under mean libration.

18 You are, of course, aware that in consequence of her librations, or noddings, or wobblings, the Moon presents to the eyes of the Earth a little more than the exact half of her disc.

19 The particles of slag powder processed by libration mill were mostly in ball and its surface was the most smooth.

振动磨所加工的矿粉颗粒大多呈圆形，表面最光滑。

20 In 1853 he combined pairs of photographs of the moon in the same phase, but under different conditions regarding libration, showing the moon from slightly different points of view.

1 平衡

balanced proportional symmetric equiponderance balance trim equation proportion poise equilibrium neutralize trimming standoff equilibration equipoise counterpoise equilibrate symmetrize equiponderate counterbalance counterweigh stato- scale trade-off equanimity isostasy even weigh librate

2 振动

libratory vibrant vibratory oscillatory wave vibration bob oscillation vibrancy jarring shimmy undulation vibrance rock vibrate chatter oscillate judder

3 摆动

libratory swinging wiggly oscillatory pendular swing hunting vibration bob flirt stagger oscillation wag shimmy wabble pendulate roll shake hunt flap traverse wiggle vibrate flicker oscillate vacillate wigwag librate switch walking swingy about waggle move rock sway waver