I can't say for sure 我不能确定 ; 我不敢肯定的说 ; 我说不好
i can't say for sure
我不敢肯定
以上为机器翻译结果，长、整句建议使用 人工翻译 。
I think he'll be back on Monday, but I can't say for sure.
我想他星期一会回来，不过我不敢肯定。
《牛津词典》
I can't say for sure, but you can ask them.
我不太确定，不过你可以问他们。
youdao
I can't say for sure what Giles really wanted.
我说不准贾尔斯真正想要的是什么。
" Cochran confidently replied, "I can't say for sure, but I think he's looking forward to that.
CNN: O.J. Simpson Profile: The Adult Years
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