| 1. | Fatty acids can be divided roughly into two main classes .
脂肪酸可粗略地分为两大类。 |
| 2. | The main classes of materials are metals, polymers, ceramics, and composites .
材料的主要分类为金属、高聚物，陶瓷，及合成材料。 |
| 3. | There are many kinds of intra-community invasions, but in general they may be grouped into two main classes .
社区范围内的侵入现象多种多样，但一般来说可以划分为两大类。 |
| 4. | The main classes involved in service creation are
创建服务所涉及的类主要有： |
| 5. | Moving code from the old main class to the new class
将代码从旧主类移动到新类 |
| 6. | The main class that provides digital enveloping is the
提供数字封装的主要类是 |
| 7. | The main class that provides digital signing is the
提供数字签名的主要类是 |
| 8. | Move your code from the old main class file into the new
将代码从旧的主类文件移到新的 |
| 9. | Namespace contains the following main classes
命名空间包含以下主要的类： |
| 10. | Implement a test class that is separate from the main class
实现与主类分开的测试类。 |
