off the top of one's head片語

片語

1. 1

   不加思索地、憑印象、隨口口語

   Off the top of my head, I'd say about thirty people attended.

   憑印象說，大概有三十個人出席。

2. 2

   即興地、當場想出口語

   He came up with the whole plan off the top of his head.

   整個計畫都是他當場想出來的。