Colitoxin
大肠杆菌毒素
🗣️ 情景例句
Susan Stewart …
Susan Stewart……
Opportunity seldom knocks twice.
机不可失，失不再来。
The sea bed was scoured with powerful nets and there was tremendous excitement on board went a chest was raised from the bottom.
他们用结实的网把海床搜索了一遍。