灰尘

The total phases are also seen to differ in color and darkness . Those effects are due to changes in cloud cover and dust content in the atmosphere reddening and refracting sunlight into Earth's shadow.

同时，月球的相位在颜色和明暗上似乎也不同，这是因为大气中的云和灰尘向地球的阴影中折射了日光染红了月面。

Repace the thrust bearing in the Fidaptor periodically,when you use the Fidaptor repeatedly,bearing will wear and become damaged,thereby losing their smooth rotation and resulting in deteriorated measurement accuracy.

定期更换精度调节器的推力轴承。频繁使用精度调节器后，轴承受到磨损，失去平滑旋转的能力，降低测量精度。2 使用前检查调节器：灰尘、缺少黄油或主轴弯曲均会降低测量精度。

Dust from brick cutting may contain respirable particles, which may also include harmful silica dust.

切割砖块时产生的灰尘中含有可吸入的颗粒，它含有害的二氧化硅。

It's time to restring your tennis racquet or dust off the old golf clubs, but that tendon pain in your elbow, shoulder or ankle may force you to keep the clubs in the bag or the racquet in its case.

这时正是你应该重新调整好你的网球拍，或者是把你的老高尔夫球杆上的灰尘拭去出去运动，但是由于你肘部、肩部或者是脚踝里面的腱子的疼痛或许迫使你收回你的高尔夫球杆和网球拍，无法运动。

From the moment Saccus saw Eul in his suit of heavy ebony and blazing dai-katana and Beraid in his collection of dusty, rusted lizard-scales and spear from Hazadir's shop, he knew who would win.

当Saccus看到Eul穿着他的重乌木甲和锋利的武士刀，Beraid用的是满是灰尘的，生锈的蜥蜴式长矛，他就知道谁会赢了。

One scabbed sheep will mar a whole flock.

羊踩起的灰尘挡不住狼。

The floor was sheeted with dust.

地板上积着一层灰尘。

The dust sifted in through the cracks in the window.

灰尘从窗户的裂缝里钻了进来。

The source profile and relative contribution to receptor of determined soil/fly ash,constrction locate,incinerator,sea spary,exaust and non-ferror was deduced by PMF2. Among them,soil and fly ash contributes 40% to receptor.Enrichment factor analysis were also performed to identify possible sources in Beijing urban area with die data measured in the study.

通过对富集因子分析得出Fe，Sc，Ti的EF近似等于1，验证了针对于本采样地区它们都是较好的参考元素：Al，Ba，Ca，Ce，Mg，Dy，La，Lu，Sm，Tb，Ta，Th，Hf，Sc，Fe，Ti等的富集因子接近于1，表明了它们的土壤／灰尘来源：来自人为污染排放源的As，Br，Cd，Hg，I，In，Se，Sb，S，Zn等在粗、细颗粒物上都具有较高的富集值，特别是在细颗粒物上的EF明显高于粗颗粒物。

Their behaviour was at times appalling; when little they would spend long stretches of each class on the floor behind the benches, playing with bits of mercury, pricking it with needles and pen nibs, watching it slip into the coarse splintery cracks of the dusty floorboards, and forcing it out again, marvelling at the way it shrugged the dirt off its rounded shoulders.

有时她们的举动简直令人感到震惊。年纪小时，在一节课的大段时间里，她们会蹲在凳子后面的地板上，弄着几滴水银玩，用针和笔尖刺水银，瞧着水银珠滚进粗糙的、锯齿状的，布满灰尘的地板裂缝里，然后又把水银挑出来，惊异地发觉水银怎样把尘土从它的圆肩膀上甩掉。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！