1. The doctor explained that the hymen is a thin membrane that partially covers the opening of the vagina.
医生解释说，处女膜是一种薄膜，部分覆盖了阴道口。

2. Some cultures place a strong emphasis on the presence of an intact hymen as a sign of virginity.
一些文化非常强调完整处女膜作为贞操的象征。

3. The hymen can sometimes be torn or stretched during physical activities like horseback riding or gymnastics.
处女膜有时会在骑马或体操等体育活动中被撕裂或拉伸。

4. It is a common misconception that the presence or absence of a hymen is a definitive indicator of virginity.
存在或缺乏处女膜是贞操的确凿标志是一个常见的误解。

5. Some women may not have a hymen at all due to genetic variations or other reasons.
一些女性可能根本没有处女膜，原因可能是遗传变异或其他原因。

6. The hymen may break or tear during sexual intercourse, but this does not necessarily indicate loss of virginity.
处女膜在性交过程中可能会破裂或撕裂，但这并不一定意味着失去贞操。