Biv
牛免疫缺陷样病毒
🗣️ 情景例句
Now let's discuss the terms of payment.
现在来讨论付款条件。
The chance to enter the college came and he took it.
有一个上大学的机会，他抓住了这个机会。
The test finished. We began our holiday.
考试结束了，我们开始放假。