| 1. | There are three main types of cancer of the skin .
皮肤癌主要有三种。 |
| 2. | One of the two main types of aquifer is the unconfined aquifer .
非承压含水层是两种主要含水层之一。 |
| 3. | Commercial fishermen catch three main types of fish in lake baikal .
在贝加尔湖，商业捕鱼人员主要捕获三种类型的鱼。 |
| 4. | There are two main types of uses of radioactive isotopes in biochemistry .
在生物化学中，放射性同位素主要有两方面的应用。 |
| 5. | These passive circuit elements, as they are often called, are of three main types .
通常所说的无源电路元件有三种主要类型。 |
| 6. | Commercially two main types of hydrogenations are carried out with nickel catalyst .
商业上采用的以镍作催化剂的氢化有两种。 |
| 7. | Two main types can be distinguished: ecoclines(clines along an ecological gradient) .
可以区分两个主要类型，即生态梯度变异（即沿着生态梯度出现的梯度变异）和另一种。 |
| 8. | The four main types of gears (spur, helical, worm, and bevel)and a rack and pinion are shown in figure 7 .
图7所示是四种主要的齿轮（巨齿轮，斜齿轮，蜗轮和伞齿轮）以及齿条和小齿轮。 |
| 9. | In the mammary gland are two main types of tissue: first the parenchyma or glandular tissue and, secondly, the stroma or supporting tissue .
乳腺有两种主要组织：第一是主质，即腺组织，第二是基质、即支持组织。 |
| 10. | Polymers are most commonly formed by two main types of growth reaction traditionally referred to us condensation (step reaction) and addition (chain reaction) processes .
形成聚合物的最普通方式是靠两种主要的增长反应，习惯上分别称做缩合（逐步反应）过程和加成（链式反应）过程。 |
