当我们的祖先身体被毛发覆盖时，当人感到沮丧或者寒冷的时候皮肤上的一种叫“立肌”的肌肉会收缩，使他们的毛发竖立起来。
When our ancestors were covered in fur, muscles in their skin called "arrector pili" contracted when they were upset or cold, making their fur stand on end.
这些猫的哀叫引得我的狗毛发竖立。
据说恐惧有时会使毛发竖立起来。
It is said that fear sometimes causes the hair to stand on end.
我看到一条发怒的狗，它的毛发竖立著。
毛发竖立，鸡皮疙瘩汗毛因恐惧或寒冷而竖立；鸡皮疙瘩。
The bristling of the body hair as from fear or cold; goose bumps.
被毛绝对直，且竖立在身体的主要部位，但一般在四肢的毛发平躺着，略显平坦。
The coat is absolutely straight and off standing on the main trunk of the body but generally lies somewhat flatter on the limbs.
然后，她向后一跃，脊背拱起，毛发竖立，尾巴僵 直地伸着。
Then she leapt backwards, back arched and fur on end, tail held out stiffly.
毛发竖立，鸡皮疙瘩汗毛因恐惧或寒冷而竖立；
The bristling of the body hair, as from fear or cold; goose bumps.
毛发竖立，鸡皮疙瘩汗毛因恐惧或寒冷而竖立；
The bristling of the body hair, as from fear or cold; goose bumps.
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