| 1. | There are three main types of cancer of the skin .
皮肤癌主要有三种。 |
| 2. | They are of two main classes, protective duties and revenue duties .
关税主要有两种，保护税和所得税。 |
| 3. | Characteristic defects are of two main types; regression and syneresis .
特征缺陷主要有两类：即退化和脱水收缩。 |
| 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 interactions are of two main types, namely, scattering and absorption .
在这些相互作用中，主要有两种类型，即散射作用和吸收作用。 |
| 6. | Two main lines of attack have been followed, one being chemical and the other electrical .
处理方法主要有两类，一是化学方法，另一是电的方法。 |
| 7. | There are two main kinds of iron used for making steel: "basic" iron and "hermatite" iron .
用来炼钢的铁主要有两种，“碱性铁”和“低磷生铁。” |
| 8. | The digital integrated circuits are classified into five major categories, often called "families" .
数字集成电路主要有五种类型，通常又称为系列。 |
| 9. | There are, in the main, two positions which may be taken up by those who believe in a law of evolution .
相信进化规律的人可能提出的论点主要有二。 |
| 10. | There are three main operations in the heat treatment of steel: hardening, tempering and annealing .
钢的热处理操作主要有三种，即：淬火，回火和退火。 |
