Centreboard
n. 船底中心垂直升降板, 装有升降板的小船
📖 牛津释义
centreboard
n moveable board that can be raised or lowered through a slot in the keel of a sailing-boat to prevent drifting 中插板（船底中心防止船漂移的垂直升降板）. =>illus at dinghy 见dinghy之插图.
🗣️ 情景例句
What time will the plane land?
飞机在什么时间降落？
Theings past cannot be recalled.
过去的事情无可挽回。
Opportunity knocks but once.
机不可失，时不再来。