combined carbon

基本解释

In the second step of photosynthesis, the hydrogen is combined with carbon dioxide to make sugar.
光合作用的第二步是氧与二氧化碳的结合制造出糖。
This tool was subjected to chemical analysis and was found to contain combined carbon, which suggests that it may have been composed of steel.
这工具受化学分解的影响而发现含有二氧化碳，使人猜想由铁组成。
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Nevertheless, the combined carbon content and isotope analyses of micro-carbonate in metamorphic rocks can be used to make a distinction in origin between sedimentary and igneous protoliths.
不过，变质岩中微量碳酸盐的碳含量和碳同位素比值分析能够对原岩类型提供有效的判别。

These include Yuri Suzuki, a materials scientist at the University of California, Berkeley, who is building stacks of metal oxides in the hopes that, when combined with carbon-based materials, they'll blend into a new kind of semiconductor that can control spin at normal temperatures.
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Meanwhile, these lamps combined will equal to carbon emissions of all the motor vehicles in the UK. This can be a bit depressing, but there is some good news.
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The ability to use domestic, clean, affordable natural gas combined with significant amounts of carbon to produce syngas for use in a gas-to-liquids plant offers extraordinary advantages over the current system.
FORBES: Spinning Carbon to Make Gasoline and Jet Fuel