翻译：Much of the carbon in the earth comes form things that once lived.

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• 翻译：Much of the carbon in the earth comes form things that once lived.
• much of the carbon in the earth comes from things that once lived地球上大部分碳来自于曾经有生命的东西.1：comes可以去掉吗?这里固定搭配?2：things that once lived可以改成ever living things吗?为什么?
• 请帮我翻译这句话,"Much of the carbon in the earth comes form things that once lived."
• 请帮我翻译这句话,"Much of the carbon in the earth comes form things that once lived."
• 翻译：Much of the carbon in the earth comes form things that once lived.
• much of the carbon in the earth comes from things that once lived地球上大部分碳来自于曾经有生命的东西.
• 请帮我翻译这句话,"Much of the carbon in the earth comes form things that once lived."
• many species of animals which once lived on the earth( ) no longer in existence.