哈利老师英语写作课E33

exactly adv. 精确地/准确地
例句
Every patient received exactly the same amount of the drug.
每个病人都接受同等剂量的药物治疗。

to be exact 准确来说（此短语用在句子末尾）
例句
The rocks there are very old: more than 3 billion years old, to be exact.
那里的岩石非常古老，准确来说，已经有30亿年历史。

precisely adv.精确地/准确地
例句
No one knows precisely how many people were killed or injured.
没有人准确知道到底有多少人被杀，多少人受伤。