如果你不能确切地说出你在创造些什么，就不应该去做。

If you cannot firmly say exactly what it is you're creating, you should not do it.

youdao

我不能确切地说出那所房子的年代，但一定是很古老的。

I can't date that house exactly, but it must be very old.

youdao

没有人能确切地说出这件事的历史意义，因为古罗马人根本不知道冰岛的存在。

No one is quite certain what this signifies historically, as the very existence of Iceland was unknown to the ancient Romans.

youdao