A person/animal living in a place Can be breathed (呼吸) To move from one place to another A gas in the air for animals to live To change or make something A group of small drops(滴) of liquid(液体) in the air To make a solid固体 become liquid by adding heat To keep/continue to hold Throw (light, heat, sound, etc) back from a surface Of the North or South Pole

To cover something with very tiny(微小) drops of liquid that are sent through the air The round(圆环) of an object traveling round a planet, star or moon The force that attracts objects together or pulls things to the ground on earth Related(与。。。有关) to the Sun A special clothing for astronauts(宇航员) A fact; event; action showing sth. to happen To organize and do An organized journey with a special purpose

Of the planet(行星) Mars Of something between the planets To completely change the appearance and character of something, especially to become better

transform (彻底)改变 interplanetary 行星间的 Martian 火星的 expedition 远征探险考察 conduct 进行 sign 迹象／征／预兆 gravity 地球引／重力 solar (利用)太阳的 orbit 轨道 polar 极地的 spray 喷(射) reflect 反射 retain 保持／留 melt 熔化／融化 vapour 蒸汽／蒸气 convert 转变／变换 oxygen 氧气 migrate 迁徙／移居 breathable 可以吸入的 inhabitant 居民／栖居者

transform vt. interplanetary adj. Martian adj. expedition noun. conduct vt. sign noun. gravity noun. solar adj. orbit noun. polar adj. spray vt. reflect vt. retain vt. melt vi. vapour noun. convert vt. oxygen noun. migrate vi. breathable adj. inhabitant noun.