一些专家认为，打印机可以使用大量的可再生能源，比如用草来替代常见的成分。
Some experts believe printers could use plentiful renewable sources like grass to replace the familiar ingredients.
新成分由多孔碳职称，比起它所替代的锂钴氧化物远为便宜。
The new component is made of porous carbon, which is far less expensive than the lithium cobalt oxide it replaces.
一部分戒烟制品因为其内含有一定量的尼古丁成分被认为是尼古丁的替代疗法，其他不含尼古丁的制品则属于处方制剂。
Some quit-smoking products are known as nicotine replacement therapy because they contain small amounts of nicotine. Others are prescription medications without nicotine.
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