种类

• There are two types of cell lines .
  有两种类型的细胞系。
• It also exists in active and inactive forms .
  它也存在着活跃的和不活跃的两种类型。
• She had soon fixed on the size and sort of portrait .
  她很快决定了画像的尺寸和种类。
• The epidermis consists of a single cells .
  表皮是由几种不同种类的细胞的单层所组成的。
• The variety of goods that the peddlers sold was staggering .
  小商贩们卖的商品种类繁多。
• Both types of organisms are ubiquitous in nature .
  在自然界中普遍存在两种类型的生物体。
• Bone occurs in two typical forms, spongy and compact .
  骨有两种类型，即松质骨与坚质骨。
• In fresh waters, few or no stocks remain unexploited .
  在淡水中，未开发利用的种类很少或已没有。
• The digestive tract is inhabited by many species of parasites .
  寄生于消化道的寄生虫，种类很多。
• Some associations of species are almost a form of commensalism .
  有些种类的组合几乎是共栖的形式。