例句
How much carbon dioxide you save, if any, depends on how far you live from work and how you get there, among other things.
如果真有的话，你可以节约多少二氧化碳？ 它取决于你住得有多远还是你如何完成目标抑或其他因素？
Studying the light in each image could also reveal physical characteristics, such as the presence of water or carbon dioxide.
研究每个行星图像中的光线同样可以揭示物理特性，如是否存在水或二氧化碳。
And then we have gas cooled reactors which can use supercritical carbon dioxide or helium.
然后我们有气体冷却反应堆,那能使用超临界二氧化碳或者氦。