be quick off the mark

US /bi kwɪk ɔf ðə mɑrk/
UK /bi kwɪk ɔf ðə mɑrk/
"be quick off the mark" picture
1.

反应迅速, 理解力强

to be quick to understand or respond to something

:
She was quick off the mark to answer the difficult question.
反应迅速,回答了那个难题。
The company was quick off the mark to adapt to the new market trends.
该公司迅速适应了新的市场趋势。