The lines are at an acute angle.

这两条线相交成锐角。

It is an acute Angle.

这是一个锐角。

Objective: to summarize the first-aid and nursing of acute angle-closure glaucoma.

目的：总结急性闭角型青光眼的急救与护理。

The acute Angle theorem is extended under the condition of the variational structure.

在具有变分结构条件下推广了锐角原理。

Right triangle: One of the three angles is a right Angle. The other two are acute angles.

直角三角形：有一个角是直角，有两个角是锐角。