like: one thing → →
to know one thing for sure ☊ 
biết chắc một điều ☊ (1) skull, brain, cranium (2) to take or mistake one thing for another ☊
sọ ☊ I have a hundred and one things to do. ☊ hundred ☊
There's only one thing we can do. ☊ one ☊
It's the one thing I can't stand about him. ☊ one ☊
One thing is for sure—it's not going to be easy. ☊ for sure ☊