thorny

The young captain is pondering over a thorny problem.

年轻上尉正在思考一个棘手题。

The boys argued over the thorny points in the lesson.

孩子们辩论功课中难点。

This thorny problem on the environmental protection floored the new mayor.

这个关于环境保护棘手难题把新任市长难住了。

The dog hurt one of its pad when it stepped upon a thorny path.

这只狗在踏上一条有荆棘小路时,伤了一只爪垫。