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helium

/'hi:liәm/

★☆☆☆☆托福英语词汇

📖 中文释义

  1. n. 氦
  2. [化] 氦

💬 双语例句

  1. Despite their great promise, however, superconductors have limits, the primary one being that most superconduct at very low temperatures – indeed, near absolute zero (-273 ºC). Such temperatures can be achieved only through liquid-helium cooling.

    虽然拥有巨大的前景,但超导体也存在自身的限制,其中最主要的一点就是大多数超导现象只有在极低温环境下才能实现 — — 事实上就是接近绝对零度 ( - 273摄氏度 ) 。 而这种温度只能通过液氦冷却来实现。 因此当瑞士研究人员在1986年宣布发现了一种可以在比前纪录保持者高一倍的温度下实现超导的铜氧化物时,全世界都为之一振。

  2. In the fission reactions that nuclear power generation relies on today, heavy elements such as uranium break into smaller ones, while in nuclear fusion small elements such as hydrogen stick together and form heavier elements (helium). Both fission and fusion produce a lot of energy.

    在我们今天用来产生核能的核裂变反应中,是把铀这样的重元素裂变成小的元素,而核聚变是把像氢这样的小元素结合在一起形成重元素(氦 ) 。 核裂变和核聚变都能产生巨大的能量。

🔵 同义词

🔗 常用搭配

heavier elements heliumelements heliumhelium coolingliquid heliumthrough liquid helium
📘 English Definition(英文释义)
  1. n. a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)