grade up的用法和樣例：
例句
用作名詞 (n.)
- He pedaled his way up the slope.
他騎著(zhù)腳踏車(chē)上坡。 - I dismounted and began to push my bicycle up the hill.
我從自行車(chē)下來(lái)，開(kāi)始推著(zhù)上坡。
詞匯搭配
- grade up 上坡
- on the up grade 上升(上坡
- up to grade 合格
