The dust tail usually points back along the comet's path.

尘埃彗尾通常背向彗星运行的轨迹。

One is a dust tail, which is blown away by the solar wind.

一条是尘埃尾，是被太阳风吹出来的。

The dust tails look white or a teeny bit yellowish, due to reflected sunlight, while the ion tail glows blue or green, depending on the primary constituents of the gas.

由于太阳光反射的原因，尘埃彗尾看起来是白色或微黄色的，而离子彗尾则发出蓝色或绿色的光，这取决于气体的主要成分。

The dust streams away, but because the pressure isn't as intense as the solar wind is on the gas tail, the dust tail blows away more lazily, and tends to lag behind the comet in its orbit.

尘埃会流走，但由于这种压力不像太阳风对气体尾流的影响那么强烈，所以尘埃尾流移动得更缓慢一些，而且往往落在彗星轨道的后面。