最近，行星科学家提出，地球生物圈发展的外部先决条件可能包括四个最重要的偶发事件。
Recently planetary scientists have suggested that the external preconditions for the development of Earth's biosphere probably included four paramount contingencies.
正像过去的专家用模型预测的那样，地球生物圈正经历这样的升温。
Past history suggests that the Earth's biosphere resists the kind of run-away warming some experts' models have predicted, at least to a point.
最为熟知的应当是真核域，尽管对于地球生物圈而言，它可能并不是最重要的部分。
The most familiar domain, though arguably not the most important to the Earth's overall biosphere, is the eukaryotes.
应用推荐