| 单词 | Invar |
| 释义 | Word Frequency Invar(ɪnˈvɑː) noun trademark an alloy containing iron (63.8 per cent), nickel (36 per cent), and carbon (0.2 per cent). It has a very low coefficient of expansion and is used for the balance springs of watches, etc Word origin C20: shortened from invariable |
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