自从很大部分的碳足迹与电脑及网络相关，预期将会有更多的类似的公告，特别是在电信与金融服务类的公司中。
Expect more such announcements, in particular from telecoms and financial-services firms, since a large part of their carbon footprints is associated with computers and networks.
相反那些被发现的碳类物质进入到地下使碳汇变成碳源。
The discovery reverses what was thought of as a carbon sink into a carbon source.
而多数行星模型均假设它们和我们太阳系的类地行星相似，即在大气中碳含量是氧含量的一半左右。
Most models of planets assume that they are similar to the terrestrial planets in our own Solar System, with about half as much carbon as oxygen in the atmosphere.
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