Working by chemical reaction, and being independence of atmospheric oxygen, rockets are used to power interplanetary space vehicles.
到底选哪个呢?
谢谢啦
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independence 改成 independent
同意楼上gg的意见,be independent of,是固定搭配。不受。。。的限制。
谢谢大家的解答。感觉语法是越看越乱了。明天可不能出错了。
good luck
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