Colitoxin
大肠杆菌毒素
🗣️ 情景例句
We have to communicate with them more by sending lobbyists.
我们必须通过派遣更多的公关人员。
When I slept, he was out.
当我睡了时候，他外出了。
Did you give our English teacher a card for Teachers' Day?
你给了我们的英语老师教师节贺卡了吗？