helium是什么意思？helium怎么读？helium例句及用法

1 . After hydrogen, the atom with the simplest structure is that of helium .

在氢元素之后, 氦的原子结构最简单.

来自辞典例句

2 . Helium is a very light gas.

氦是一种非常轻的气体。

3 . Helium is a gas used in balloons.

氦是一种用于气球的气体.

来自《现代汉英综合大词典》

4 . 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.

来自英汉非文学 - 科技

5 . The helium - 3 apparently became trapped when the earth was formed.

显然,当地球形成时,氦 - 3就被圈闭了.

来自英汉非文学 - 科技

6 . After hydrogen, the atom with the simplest structure is that of helium .

在氢元素之后, 氦的原子结构最简单.

来自辞典例句

1.氦：一种无色、无臭及无味的惰性气体，不自燃也不助燃。最初自太阳中测出，后从天然气体中获得。化学符号He，原子序2，原子量4.003。医学上〔USP〕用作气体的稀释物，例如在治疗某些呼吸障碍时用以稀释氧。也用作全身麻醉药的稀释剂

1.氦氖激光器，helium-neon laser, He-Ne laser 以氖为工作物质、氦为辅助气体的激光器

1.氦镉激光器，helium-cadmium laser

1 . 氦气

numerical simulation on scatheless measurement of heliumpressure in fuel rod ., 燃料棒内氦气压力无损检测的数值模拟.

2 . 氦

Alpha particles positively charged heliumnuclei obtained from natural radioactive decay ., 粒子是从天然放射性蜕变得到的带正电的氦核.

3 . 氦的

provide adequate ventilation where heliumis being used .为正在使用氦的地方提供充分的通风。

4 . 氦元素

These react to form helium, yet more neutrons and a whole lot more energy ., 这些混合物发生反应后就形成氦元素 , 并同时生成更多的中子与大批量的能量.

helium相关短语搭配

1 . 氦气球

the helium - filled globes will be covered with thin - film , flexible photovoltaic panels to capture sun's rays .充满氦气球体的表面是薄膜.柔软的光电板用来捕获太阳光线.

1 . 氦液化器

helium liquefaction 氦液化helium liquefier 氦液化器helium neon laser 氦氖激光器

1 . 氦气冷却

2. helium counterhelium cooling 氦气冷却helium fusion process 氦聚变过程

1 . 氦气测量

...helium mass spectrometer leak detector,氦质谱检漏仪helium survey,氦气测量Helmholtz coils,亥姆霍兹线圈