confirm,ascertain,substantiate 区别?confirm,ascertain,substantiate 都有“确认、证实”的意思,怎么区分?

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confirm,ascertain,substantiate区别?confirm,ascertain,substantiate都有“确认、证实”的意思,怎么区分?confirm,ascertain,s

confirm,ascertain,substantiate 区别?confirm,ascertain,substantiate 都有“确认、证实”的意思,怎么区分?
confirm,ascertain,substantiate 区别?
confirm,ascertain,substantiate 都有“确认、证实”的意思,怎么区分?

confirm,ascertain,substantiate 区别?confirm,ascertain,substantiate 都有“确认、证实”的意思,怎么区分?
confirm和substantiate都含“证明或证实...是真实的或准确的”意思.
confirm指“用事实或证据来进一步证实或证明...是真实的”,如:confirm a rumour证实谣言.
substantiate指“列举事实以证实某一主张是有效的”,如:The slanderer
cannot substantiate his tale.那个诽谤者不能证实他的谎言.
ascertain指“探知,发现; 确定,调查,查明,断定”,如:I ascertained that she was dead.我断定她已经死了.