solar system 太阳系 ridges 山脊 channels 沟槽 shape 决定，影响 topography 地形，地貌 retreat 消退，缩小 potential 潜在的 听力练习 一、听第一遍音频，回答问题。 1. The new approach allows researchers to… a. collect data about satellites in the ...
Follow ZDNET: Add us as a preferred source on Google. Virtual assistants will soon be as commonplace as smartphones -- in many parts of the world, they already are. Most smartphones have a built-in ...
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