Plesiosauri
n. 蛇颈龙（等于plesiosaur） (plesiosaurus的变形)
🗣️ 情景例句
Medicine should be stored somewhere your kids can't reach it.
药物应摆放在孩子们够不着的地方。
This will be the biggest fish ever.
这是前所未见的大鱼吧？
It is bacteria that have generated the oxygen we breathe on earth.
正是细菌生产出我们在地球上呼吸的氧气。