emission
英 [iˈmɪʃ.ən]
美 [iˈmɪʃ.ən]
- n. （光、热等的）发射，散发；喷射；发行
- n. (Emission)人名；(英)埃米申
使用频率:
记忆方法
记忆“emission”的方法可以是将它分解为“e”+“miss”+“ion”。想象“e”代表“out”（出去），“miss”作为动词“miss”（错过）或“send”（发送），而“ion”是名词后缀，意味着状态或行为。所以，可以想象为“送出去的（气体、辐射等）”，这样就容易记住它的意思是排放或散发。
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英语词源
- emission (n.)
- early 15c., "something sent forth," from Middle French émission (14c.) and directly from Latin emissionem (nominative emissio) "a sending out, a projecting, hurling, letting go, releasing," noun of action from past participle stem of emittere "send out" (see emit). Meaning "a giving off or emitting" is from 1610s.
权威例句
- 1. the emission of carbon dioxide into the atmosphere
- 向大气排放二氧化碳
- 2. The emission of gases such as carbon dioxide should be stabilised at their present level.
- 二氧化碳等气体的排放应该稳定在当前水平。
- 3. States have the option of adopting the even tougher California emission standards.
- 各州也可以任意选择,是否采用加利福尼亚州更严格的排污标准.
- 4. Thus, noncontinuous emission limitations were appropriate only when continuous controls were infeasible.
- 因此, 非持续性排放限制只有在持续性控制技术变得不可行时才是适当的.
- 5. One set of provisions tightens emission standards.
- 一套使排放标准更加严格的规定.