certainly, 英语单词,主要用作 副词,意为“无疑,确定;当然;行(用于回答);必定”等。 [1] 1.ADV You use certainly to emphasize what you are saying when you are making a statement. 的确; 无疑地 [ADV with cl/group] [强调] 2.ADV You use certainly when you are agreeing with what someone has said. 当然 [ADV as reply] 3.ADV You say certainly not to say "no" in a strong way. More @Wikipedia
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