Are you sure you've got that on the right way round?
你能肯定你没有穿反吗？
One thing is for sure ─ it's not going to be easy.
有一点可以肯定——事情不会很容易。
I'm sure that you will get your wish.
我相信你会心想事成。
Make sure you park your car clear of the entrance.
切莫把车停在入口处。
We make sure our clients get the best that money can buy.
我们确保客户买到最好的产品。