?? 詞語組成解析
鋸齒形的
a. 有某種或幾種刃的
??? 情景例句
Of course, Harry.
當然可以， Harry。
To push a baby carriage
推嬰兒車
Before you leave the lab, make sure the electricity is turned off and the windows are shut.
你們離開實驗室前，務必要關上電源，關好窗戶。