off the top

基本解釋

Trim longer hair off the top using sharp scissors.
用鋒利的剪刀修剪頭頂?shù)拈L(zhǎng)發(fā)。
When Tiger was nine months old, Earl sawed off the top of an old golf club.
老虎長(zhǎng)到九個(gè)月大，伊爾把一把高爾夫球棒的頂端鋸掉給他了。
But the zone is largely treeless, studded with house-size rocky chunks, called hummocks, that broke off the top of the mountain when it exploded.
然而這個(gè)區(qū)域還是基本上光禿禿的，布滿了房子般大小的巖石塊，形成一個(gè)個(gè)的小山崗，這些都是火山噴發(fā)的時(shí)候從山頂滾落下來(lái)的。

His name was Arnold Parks. He caught another worker who had fallen off the top of the canyon.
Are there other indicators or tricks or rules of thumb that just off the top of your head come to you as useful mechanisms for doings this as well?
當(dāng)然還有沒(méi)有其他的,一些暗示或者說(shuō)技巧,或者規(guī)則之類有用的辦法呢？
哈佛公開(kāi)課 - 計(jì)算機(jī)科學(xué)課程節(jié)選
Alums with Nobel prizes? Oh, I don't... I can't think of any like, off the top of my head.
獲得諾貝爾獎(jiǎng)的校友嗎？這個(gè)……我一時(shí)還想不出來(lái)。
知道約翰·納什嗎？ - SpeakingMax英語(yǔ)口語(yǔ)達(dá)人

Reporters call me directly and I have to answer them off the top of my head.
FORBES: Creating And Conveying Your Media Message -Media Training