| 单词 | energy |
| 释义 | Word Frequency energy(ˈɛnədʒɪ) nounWord forms: plural -gies 1. intensity or vitality of action or expression; forcefulness 2. capacity or tendency for intense activity; vigour 3. vigorous or intense action; exertion 4. physics a. the capacity of a body or system to do work b. a measure of this capacity, expressed as the work that it does in changing to somespecified reference state. It is measured in joules (SI units) Symbol: E5. a source of power See also kinetic energy, potential energy Word origin C16: from Late Latin energīa, from Greek energeia activity, from energos effective, from en-2 + ergon work |
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