WordMate - 在线英语词典

helium 'hi:liәm

TOEFL 柯林斯1⭐

释义

n. 氦
[化] 氦

英文释义

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)

BNC词频排名: 17,116 | 当代语料库词频排名: 11,819