Centerboard
n. (帆船的)活動船板,中插板
??? 情景例句
He's upset over the fact that he wasn't promoted this year.
他對今年沒有升遷感到惱怒。
You need an injection.
你需要打針。
If you hate science stories, you are unlikely to enjoy reading them in English.
如果你不喜歡讀科學小品，你很可能也不會喜歡讀英文的這類圖書。