He staggered a little under the weight of his backpack.
他身上的背包压得他有点步履蹒跚。
He lay back on the grass using his backpack as a pillow.
他用背袋当枕头仰卧在草地上。
I took his backpack by mistake.
我错拿了他的书包。
He said that he had lost his backpack.
他说他把双肩背包弄丢了。
这是他的背包。
它是他的双肩背包。
Hansel began filling his backpack up with little pebbles that he found on the ground.
汉梭开始把从地上捡到的小鹅卵石装进他的背包里。
His backpack should be in the classroom.
他的背包可能在教室里。
His backpack was heavy and his feet were slow.
他的背包很重，脚步缓慢。
His backpack was heavy and his feet were slow.
他的背包很重，脚步缓慢。
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