do not hesitate to

基本解釋

Look at hybrid methods and do not hesitate to mix different techniques.
看一看混合的方法，在混合不同的技術(shù)面前不要猶豫。
As their name indicates, kingsnakes eat other snakes — they do not hesitate to attack, kill and consume rattlesnakes.
蛇如其名，王蛇會(huì)吃其他種類的蛇——在攻擊、殺死、消化響尾蛇時(shí)，他們從不猶豫。
You will know it if you do not hesitate to go out with them, do things with them and allow yourself to enjoy every moment being with them.
如果有約會(huì)邀請(qǐng)時(shí)你已不再遲疑，可以喝他們一起做些事情，和他們?cè)谝黄饡r(shí)每時(shí)每刻都和開心，那么我想你已經(jīng)知道答案了。

So, the point is whenever you have derivatives with something over dt, do not hesitate to cancel the dts This will be actually true as long as both quantities are vanishingly small.
關(guān)鍵在于,只要你推出的式子分母上有dt,不要猶豫,直接約掉,這個(gè)式子只在,兩遍都是無窮小的情況下成立
耶魯公開課 - 基礎(chǔ)物理課程節(jié)選

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