on-the-spot

英文解釋：

形容詞 on-the-spot:

1. at the scene of action
   同義詞：on-the-scene

副詞 on-the-spot:

1. without delay or immediately
   同義詞：on the spot
2. in a difficult situation
   同義詞：on the spot
3. at the place in question; there
   同義詞：on the spot