Ballvalves
(ballvalve 的复数) 球型人造瓣膜
🗣️ 情景例句
I'll get you to help serve later.
等一会我会叫你帮忙分菜。
One should eat to live, not live to eat.
人为生而食，非为食而生。
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。