太陽(yáng)系的天體: the sun,planet, dwarf planet,moon 太陽(yáng)系八大行星: Mercury,Venus, Earth, Mars,Jupiter, Saturn,Uranus, Neptune 內(nèi)行星的構(gòu)成:rock,metal 氣態(tài)巨行星的構(gòu)成: gas, liquid,ring (ice and dust) P星的構(gòu)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(shí)間狀語(yǔ)從句: When you look up high in the night sky, you mightsee lots of bright lights. 定語(yǔ)從句: Planets are round objects that orbit a star. 結(jié)果狀語(yǔ)從句: It's far enough away to be not too hot, yet closeenough so it's not too cold. 被動(dòng)語(yǔ)態(tài): Robots called rovers have been sent to Mars. 讓步狀語(yǔ)從句: Powerful telescopes allow us to see planets andmoons even
