我们现在通过测量掩埋在漂流物中木头放射性的碳-14元素，以精确地确定冰川作用的时期。
We now know the age of the glaciation accurately from radiometric dating of the carbon-14 in logs buried in the drift.
在那里，公共设施投资者得出的结论是每吨15加元的省碳税要比安装设施捕集碳排放便宜的多。
There, utility investors concluded it was cheaper just to pay a provincial carbon levy of C$15 a tonne than to install equipment to capture the emissions.
碳化物一种二元化合物，由碳和一个电正性的元素，尤指钙，组成。
A binary compound consisting of carbon and a more electropositive element, especially calcium.
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