人类为什么会进化出「月经」这种不利于生存的机制？不会招来大型食肉动物吗？

(bound form) bull's-eye; target

going the same way

only; as little as

(modal particle intensifying preceding clause)

not

pants

for what reason?

CL:個|个[ge4],位[wei4]

to be affected by

(bound form) this; the (followed by a noun)

for the past (amount of time)

(bound form) to reckon accounts