Off the Top of One's Head——隨興所發

** something said in an impromptu way from the knowledge you have in your memory

以一種即興的方式說出你記憶裡的知識。

** respond extemporaneously without careful thought, preparation, or investigation

在沒有仔細思考、準備或調查的情況下，即席回應。

** a random piece of information said by an expert in the topic

專家所說的隨意信息。

~~ 不經考慮；隨興所發；即興地；即席；發表即席談話；憑記憶或直覺；不假思索；無深思熟慮；脫口而出；隨口說出；魯莽地。

~~ off the cuff; without preparation; without planning; without rehearsal; based on intuition; without being planned; without premeditation; on a whim!! This idiom comes from show business. It means unpremeditated. When you're talking right off the top of your head, you're ad-libbing or speaking without advance preparation.

這個成語來自演藝界，意味着非事前策劃的。當你正在即席談論你所想時，你便是即興（沒有任何準備或練習就說）講話，或沒有事先準備的講話。

>> When the venture capitalists ask for your financial projections, don't respond off the top of your head.

當投機資本家詢問你的財務預測時，不要不經考慮地回答。

>> My insights can rarely be off the top of my head; they usually come from countless hours of research and thoughts.

我的見解很少能隨興所發；通常是經過無數個小時的研究和思考。

學勤進修教育中心英語專科導師 李啟文 教授