Geartrain
un. 齒輪系列；傳動機構\\n
??? 情景例句
Did she say why she had to leave today?
她說了她為什么今天非走不可嗎？
Could you please let us know what discount you can give for an order exceeding 400 sets?
能否告知定貨超過400臺你方所能給的折扣。
When could you make a delivery?
你們什么時候可以交貨啊？