momentum
英 [m?'ment?m]
美 [mo'm?nt?m]
- n. 勢(shì)頭；[物] 動(dòng)量；動(dòng)力；沖力
助記提示
1. 動(dòng)量表示為物體的質(zhì)量和速度的乘積，因此動(dòng)量是每個(gè)瞬間時(shí)間點(diǎn)的瞬間狀態(tài)量。所以它名稱是：moment => momentum.
2. 動(dòng)量(momentum)與沖量(impulse)的區(qū)別：動(dòng)量是狀態(tài)量，沖量是一個(gè)過(guò)程量。
中文詞源
momentum 動(dòng)力，勢(shì)頭來(lái)自拉丁語(yǔ)momentum,運(yùn)動(dòng)，變化，沖擊，詞源同moment,move.
英文詞源
- momentum (n.)
- 1690s, scientific use in mechanics, "quantity of motion of a moving body," from Latin momentum "movement, moving power" (see moment). Figurative use dates from 1782.
雙語(yǔ)例句
- 1. Demands for his dismissal have gathered momentum in recent weeks.
- 最近幾周，要求將他解職的呼聲越來(lái)越高。
來(lái)自柯林斯例句
- 2. The fight for his release gathers momentum each day.
- 爭(zhēng)取使他獲釋的斗爭(zhēng)聲勢(shì)日益加強(qiáng)。
來(lái)自《權(quán)威詞典》
- 3. The sledge gained momentum as it ran down the hill.
- 雪橇從山上下沖時(shí)的動(dòng)力越來(lái)越大.
來(lái)自《簡(jiǎn)明英漢詞典》
- 4. The historical tide is surging forward with great momentum.
- 歷史洪流氣勢(shì)磅礴,奔騰向前.
來(lái)自《現(xiàn)代漢英綜合大詞典》
- 5. The style prevails and picks up momentum.
- 這式樣很流行,而且越來(lái)越流行.
來(lái)自《簡(jiǎn)明英漢詞典》