太陽系的天體: the sun,planet, dwarf planet,moon 太陽系八大行星: Mercury,Venus, Earth, Mars,Jupiter, Saturn,Uranus, Neptune 內行星的構成:rock,metal 氣態巨行星的構成: gas, liquid,ring (ice and dust) P星的構成:ice,rock keep...from doing sth. 阻止·.....做某事 share...with...與......合用...... wash...away 沖掉......; 沖走··..· allow sb.to do sth.允許某人做某事 out ofthis world 好得不得了;非凡 時間狀語從句: When you look up high in the night sky, you mightsee lots of bright lights. 定語從句: Planets are round objects that orbit a star. 結果狀語從句: It's far enough away to be not too hot, yet closeenough so it's not too cold. 被動語態: Robots called rovers have been sent to Mars. 讓步狀語從句: Powerful telescopes allow us to see planets andmoons even