查询词典 helium

She was lost in 1921 apparently when a structural failure jammed her controls and sent her crashing into power lines near her base near Hampton Roads Va. Filled with hydrogen; she exploded in flames, killing thirty-four crew. The disaster was a major reason for the movement from hydrogen to helium in American airships..

一旦蒙皮里充满压力气体（H2）的时候，升降气囊就会使他像软式飞艇那样浮起来。1921年，他在弗吉尼亚州的汉普顿路附近坠毁，原因很清楚，一处结构损坏，卡住了他的控制器，使他一头撞上了基地附近的电线，造成泄露的氢气爆炸，致使34名机组人员死亡，这场灾难是导致美国飞艇转用氦气的主要原因。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。