这类微生物不但能够清除空气中的二氧化碳，而且能够快速繁殖——有些种类只用12小时就能翻一番，而青草及其他大型植物则需要好几个星期甚至好几个月才能达到这样的水准。
Not only do these microbes remove carbon dioxide from the air, they also grow quickly-some forms double in just 12 hours, whereas grasses and other large plants can take weeks or months to do so.
这是一个非常大的类别的餐馆包括好几个附属的种类：其中之一就是午餐柜台类，通常提供三明治和其他简餐以及饮料。
This is a very large group of restaurants which includes several subcategories. One of these is the lunch counter which ordinarily serves sandwiches and other simple foods and beverages.
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