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]...

他扭动身体，挣开背包的肩带。He squirmed out of the straps of his backpack.这些包的肩带可以调整。The bags have adjustable shoulder straps.她连衣裙上的肩带the shoulder straps of her dress...

“脸”的拼音为：liǎn...

n.止痛（退热）剂...

v.当心，提防...

“取样”的拼音为：qǔ yàng...

careers的音标：...

“夺去”的拼音为：duó qù...

A new crisis has arisen.新危机已经出现。A great clamour has arisen around the question of peace or war.是和是战,闹得甚嚣尘上.During the night a great storm has arisen.夜里来了一场大风暴....

茴香有一种与众不同的茴芹籽的味道。Fennel has a very distinctive aniseed flavour.因为你们将薄荷,茴喷鼻,芹菜,献上十分之一.You give a tenth of your spices mint dill and cumin.茴芹可以净化肾脏和肝脏.Anise aids in the cleansing the kidneys and liver....

(真题)铁矿、陨铁石、球粒状陨石及无球粒陨石在可观测到的陨石中绝不多见.Irons stony - irons chondrites and achondrites are by no means equally abundant among observed meteorites....

chickweed的音标：chickweed的英式发音音标为：['tʃɪkwi:d]chickweed的美式发音音标为：['tʃɪkˌwid]...

esterifies的音标：...

From the chromatics angle, the black lime is the half - tone, the whole leaning neutrality.从色彩学角度来说, 黑白灰属中间色调, 整体偏中性.Acidity in soil can be neutralized by spreading lime on it.土壤的酸性可以通过在它上面撒石灰来中和.If your soil is very aci...

突眼，眼球突出...

n.无线电传呼机，BP机...