英文翻译：
I don't know.
例句精选I don't know whether we can catch the train.
我不知道能否赶得上火车。
I have no idea what soya lecithin is.
我不知道什么是大豆卵磷脂。
I haven't the faintest notion what they mean.
我一点也不知道他们是什么意思。
I never knew he was a homosexual.
我从来不知道他暗地里搞同性恋。
I know nothing to the contrary.
我不知道有和这相反的情况。