题目内容
5. 我们不确定火星上能否种植物。
6. 在一个空气稀薄的行星上很难呼吸。
5. We are not sure if/whether we could plant plants/ plants can be planted on Mars.
6. It's difficult to breathe on a planet with/which has thin air.
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题目内容
5. 我们不确定火星上能否种植物。
6. 在一个空气稀薄的行星上很难呼吸。
5. We are not sure if/whether we could plant plants/ plants can be planted on Mars.
6. It's difficult to breathe on a planet with/which has thin air.