Procarcinogen
前致癌剂
🗣️ 情景例句
When are you going camping again?
你什么时候再去露营？
When am I supposed to check in?
我应该在什么时候到机场办理手续呢？
The river which forms the eastern boundary of our farm has always played an important part in our lives.
形成我们农场东部边界的一条河流一直在我们生活中发挥着重要作用。