这对于地外生命学来说意义重大。因为生命建立在碳的基础上，而由碳和氢构成的甲烷是新陈代谢的副产品。
That has big implications for extraterrestrial biology, since life is based on carbon, and methane - which is made up of carbon and hydrogen - is a byproduct of metabolism.
生物工艺中的修剪包括去除一些可能对野外生命有好处的秉性，因为这种秉性消耗能量和新陈代谢使其不能进行指定的任务。
The pruning part of biotechnology involves eliminating proclivities that might be useful to a wild organism, but drain its energy and metabolic effort away from the task at hand.
生物工艺中的修剪包括去除一些可能对野外生命有好处的秉性，因为这种秉性消耗能量和新陈代谢使其不能进行指定的任务。
The pruning part of biotechnology involves eliminating proclivities that might be useful to a wild organism, but drain its energy and metabolic effort away from the task at hand.
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