s not to be trusted
s having concealed difficulty
s marked by skill in deception
a. 狡猾的, 机敏的
1. The math problem was tricky, but I finally solved it.
这个数学问题很棘手，但我最终解决了它。
2. She gave me a tricky riddle to solve.
她给了我一个棘手的谜语让我解答。
3. Driving in the rain can be tricky for new drivers.
在雨中开车对新司机来说可能很棘手。