(每日一词）ascertain

(每日一词）ascertain /ˌæs.ɚˈteɪn/ v. 弄清，确定，查明

ascertain-n

1) 前缀：as- 表示ad- 朝向，强调作用

2) 词汇：certain 确信

双语例句：The police have so far been unable to ascertain the cause of the explosion. 警方到目前为止尚未查明爆炸的原因。

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