e careful with
Be very careful with this stuff,it can be dangerous if it isn't handled properly
这东西一定要小心,稍不注意的话就会有危险.
turn .into
1.A bad thing can be turned into a good one.
坏事可以变成好事.
2.A story is going about that our town will soon be turned into a city.
据说我们这个镇不久就会变为城市.