1 . never know
Life ' s a roller coaster and you never know when it ' s going to take a turn ., 人生就如云霄飛車 , 你不可能知道哪里會(huì)轉(zhuǎn)彎.
2 . there is no telling
6.There is no doing sth從句,表示“不可能知道、預(yù)料”。例如:There is no telling when Ladan will get arrested .拉登何時(shí)被捕難以預(yù)料。 期刊文章分類查詢.
3 . no knowing
There is no knowing what will happen in the future ., 不可能知道將來(lái)發(fā)生什么事.