discover, find, detect, ascertain
这些动词均有“发现”之意。
discover : 普通用词,指发现本来存在,但示被认识的事物、真理或情况。
Recently they have discovered a comet.(最近他们发现了一颗彗星。)
find : 普通用词,可指偶然发现,也可指经过寻找后得到或重新获得已失去的东西。强调动作的结果。
He found that the method worked.(他发现这方法行得通。)
detect : 正式用词,强调经过周密观察或研究而有所获得和发现,尤指发现有意隐藏之物。
Could you detect any odor in the room?(你闻得出房间里有什么气味吗?)
ascertain : 较正式用词,指有意搜寻与发现。
I ascertained that she was dead.(我断定她已经死了。)
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