upper course的用法和样例:
例句
- The plates on the upper shelf were beyond my reach.
上层架子上的盘子我伸手拿不到。
- He locked his diary in the upper drawer.
他把日记锁在上层抽屉里。
- My hometown is in the upper reaches of the river.
我的家乡在这条河的上游地区。
- Sediment has been washed down from the upper lake.
湖泊上游带下许多沉积物。
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