Prebiotic
a. 生命起源以前的
🗣️ 情景例句
autograph copies for the guests at the opening?
在展览开幕时为客人在书上亲笔签名呢
When I'm going to buy a TV set next time, I'll buy a console model.
下次买电视机的时候，我买叫大屏幕的。
This time it was the postman and he wanted me to sign for a registered letter!
这次是邮递员，他要我签收一封挂号信！