There's no way to tell who it was. 沒(méi)辦法知道是誰(shuí)做的。
There's no telling what you think. 沒(méi)辦法知道你在想什么。
There's no telling how long they'll last. 不知道他們會(huì)持續(xù)多久。
Do you think the new business will succeed? 你覺(jué)得新生意能成功嗎?
There's no telling what happen to it. 沒(méi)辦法知道將來(lái)會(huì)發(fā)生什么事。