Centerboard
n. (帆船的)活动船板,中插板
🗣️ 情景例句
Thank you,
谢谢你
He falls down the stairs.
他从楼梯摔了下来。
Rescue workers are therefore drilling a hole on the north side of the mine.
因此，营救人员在矿井的北侧钻了一个洞。