acute angle

Angles of less than 90 degrees are called acute angles.

小于90的角叫锐角。

The characteristic of hyphae are regular width and septation with typical branching in acute angle (about 45 degrees) in PAS stain.

病理切片经由PAS染色清楚可见麴菌菌丝，其具有隔，呈锐角状，约45角，为其特徵。

In contrast to prominent ear with underdeveloped antihelix fold, over-convex-antihelix ear reveals a sharp acute angle of antihelix and over-concaved scapha.

对于“朝风耳”的对耳轮过平坦外翻，对耳轮过前凸则是厉害的对耳轮前凸及舟状部内陷。