helium什么意思解释？

Helium is a very light gas.氦是一种非常轻的气体。A synthetic element produced in trace quantities by helium isotope bombardment of curium.锎一种合成元素,由氦同位素轰击锔可得到微量的这种元素.helium balloons for the children’s party儿童聚会用的氦气球Helium is a gas u...

Helium is a very light gas.氦是一种非常轻的气体。Helium is a gas used in balloons.氦是一种用于气球的气体.Unlike helium - 4, it cannot be produced by radioactive decay.与氦 - 4不同之处是, 氦-3不能由放射性衰变产生....

helium的音标：helium的英式发音音标为：['hi:liəm]helium的美式发音音标为：['hiliəm]...

illiquid的音标：illiquid的英式发音音标为：[ɪ'lɪkwɪd]illiquid的美式发音音标为：[ɪ'lɪkwɪd]...

I came to live at the farm by happenstance.我来到该农场住下纯属偶然。Clearly this was a profitable happenstance for both the owners and the king.显然后者对于农场主和国王来说都是收益颇丰的惊喜.Happiness is not a situation to be longed for, or a convergence ...

purveying的音标：...

adj.过分挑食的...

n.完成，实现，满足（感），实施过程...

“钡长石”的拼音为：bèi cháng shí...

n.记录保持者，保持最高记录者...

Clupeidae的音标：...

adj.非常兴奋的，极为激动的vt.“thrill”的过去式和过去分词...

Moving rapidly through school, he graduated Phi Beta Kappa from the University of Kentucky at age 18.他连续跳级，18岁时就以全美优等生联谊会成员的身份从肯塔基大学毕业。Howeer, measurements with BCECF - loaded rabbit trabeculae did not reeal any signific...

This juxtaposition of brutal reality and lyrical beauty runs through Park's stories.这种残忍的现实和浪漫美好事物的并存始终贯穿于帕克的短篇小说中。Try to avoid the too frequent use of such Latin words as juxtaposition, animadvert, salutation, reca...

The thrilling semi - finals set the stage for what should be a great game.半决赛 尚且激动人心,决赛将更扣人心弦了.They've set the stage for a protracted struggle.他们已作好长期争斗的准备.The ruling was applicable only in California, but It's...

electropuncture的音标：electropuncture的英式发音音标为：[elektrɒ'pʌŋktʃə]electropuncture的美式发音音标为：[elektrɒ'pʌŋktʃə]...

auxiliaries的音标：auxiliaries的英式发音音标为：[ɔ:g'zɪljərɪs]auxiliaries的美式发音音标为：[ɔg'zɪljərɪs]...

“引申”的拼音为：yǐn shēn...