汉语翻译：
a. 现场的, 当场的英语解释：
形容词 on-the-spot:

at the scene of action同义词：on-the-scene

副词 on-the-spot:

without delay or immediately同义词：on the spot

in a difficult situation同义词：on the spot

at the place in question; there同义词：on the spot