acute angle

Angles of less than 90 degrees are called acute angles.

小于90度的叫。

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

要相对于“朝风耳”的对耳轮过度平坦且外翻，对耳轮过度前凸则是厉的对耳轮前凸及舟状部内陷。

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，有分隔，且分枝呈状，约45度，为特徵。