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發(fā)。
When Tiger was nine months old, Earl sawed off the top of an old golf club.
老虎長到九個月大，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，形成一個個的小山崗，這些都是火山噴發(fā)的時候從山頂滾落下來的。

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)然還有沒有其他的,一些暗示或者說技巧,或者規(guī)則之類有用的辦法呢？
哈佛公開課 - 計算機科學(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.
獲得諾貝爾獎的校友嗎？這個……我一時還想不出來。
知道約翰·納什嗎？ - SpeakingMax英語口語達人

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