一位女士先致歉打扰我，然后递给我一个信封。

A woman excused the interruption and handed me an envelope.

youdao

医师会把性别写下，装进信封封好口，然后把信封交给制作聚会大蛋糕的蛋糕师或者一位好友。

Instead, the gender is written down and sealed in an envelope. The envelope is then passed to a baker or friend who makes a large celebration cake in either pink or blue.

youdao

从信封的颜色来看，这封信可能来自一位女性。

The color of the envelope suggests that the letter might be from a woman.

youdao