Argon emitted blue and green light, krypton several other colours, and mixing the two gases made a laser that could emit across the visible spectrum.
氩气产生蓝色和绿色的光，氪产生其他几种颜色，两种气体的混合可以产生整个可见光谱中的颜色。
2
Blues and purples are created by lighter gases such as hydrogen and helium, while low-level nitrogen can add red fringes to the bottoms of green auroral curtains.
蓝色和紫色是来自较轻的气体比如氢和氦，而更低点的氮气能在绿色极光的底部添上红色的边缘。
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Each and every one of us is responsible for the green house gases we emit in our daily actions and choices.