例句：The picture is much clearer with the new aerial.
裝上新天線后畫面清晰多了。
nitrogen n.氮
例句：Air consists chiefly of nitrogen.
空氣主要由氮?dú)饨M成。
oxygen n.氧
例句：Trees release oxygen into the air.
樹(shù)木向空氣中釋放氧氣。
oxide n.氧化物
例句：How can you get rid of this oxide coating?
你們?cè)撛鯓映ミ@些氧化皮?
hydrogen n. 氫
例句：Water is composed of the elements hydrogen and oxygen.
水是由氫元素和氧元素組成的。
