His brow corrugated with the effort of thinking.

他皱着眉头用心地思考。

The wind corrugates the surface of the sea.

风起微波。

He corrugated his brows in throught.

他在沉思中皱起眉头。

It could be concluded that the two-hook corrugated plate outperforms the one-hook when reentrainment is existed.

结果表明，存在二次携带情况，双钩波形板分离效率最优。

Two patterns of air plane engine inlet hot-air anti-icer are introduced in this paper, one is circumferential anti-icer, the other is double skin corrugated chord direction anti-icer.

摘要飞机发动机防冰对飞行安有十分重要的意义，对于热气防冰系统，前缘防冰器的结构型式对防冰的效果影响很大。