Cnidaria
<拉>刺胞动物, 腔肠动物
🗣️ 情景例句
Where do you usually spend your weekends?
你通常在哪度过你的周末？
Opportunity only knocks once.
机不可失，时不再来。
At that time, however, she was not only the largest ship that had ever been built, but was regarded as unsinkable,
当时，这艘轮船不仅是造船史上建造的最大的一艘船，而且也被认为是不会沉没的。