co-, 强调。-it, 走，词源同exit. 字面意思即走到一起。比较copulate.

1. This, in turn, has increased their enjoyment of coitus.

继而, 这又增添了他们性交合的乐趣.

2. They must, therefore, be inserted 10 to 15 minutes before each coitus.

所以, 每次性交前10-15分钟就必须放入阴道内.

3. Their meeting is usually about as a result of coitus.

精卵相遇通常是性交的结果.

4. The vagina receives the penis during coitus.

阴道在性交过程中容纳阴茎.

5. The intimate contact of the female sex organs during coitus can give both partners great pleasure.

在性交合过程中,男女性器官的密切接触能够给双方带来愉悦.