menstruation

名詞

1. 1

   月經、行經、經期

   Many girls begin menstruation between the ages of ten and fifteen.

   許多女孩在十歲到十五歲之間開始有月經。

2. 2

   生理期、月經期間

   Mild cramps during menstruation are common and usually harmless.

   生理期出現輕微腹痛很常見，通常無害。