| 单词 | liquid helium |
| 释义 | helium /hēˈli-əm/nounA very light inert gaseous element (symbol He; atomic no 2) discovered (1868) by Lockyer in the sun's atmosphere, isolated (1895) by Ramsay from cleveite, and found in certain natural gases ORIGIN: Gr hēlios sun helium speech noun Distorted speech such as occurs in a helium atmosphere liquid helium Helium in liquid form (below 4.22K), which has remarkable qualities, undergoing a striking change at 2.19K (see superfluidity under superfluid) |
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