2017年6月四级常用作文优美句子：说明阐述型

　　2017年6月四级常用作文优美句子：说明阐述型句型

　　... XX ... have been used for ... The former / first ... The latter / second ...

　　☞ 原文

　　▌Two main techniques have been used for training elephants, which we may call respectively the tough and the gentle. The former method simply consists of setting an elephant to work and beating him until he does what is expected of him…The gentle method requires more patience in the early stages, but produces a cheerful, good-tempered elephant who will give many years of loyal service.

　　驯象主要有两种方法，可分别称为强硬法和温柔法。简而言之，前一种方法就是让象干活，并把它打到顺从为止……温柔法在早期需要(驯象者)更大的耐心，但驯出的象心甘情愿，脾气好，会为主人忠心服务多年。

　　☞ 巧用

　　▌Three approaches can be used for improving air quality. The first is to plant more trees ... The next is to use clean energy ... Finally, the government needs to optimize industrial layout.

　　有三种方法可以改善空气质量。一是增加绿化，而是使用清洁能源，三是优化工业布局。

　　★ 点评 ★

　　该例是说明文极为常见的类型，叙述时如果想使语言增加变化，可采用词汇替换等手段。另需注意：说明文宜多采用被动式，译成汉语时可考虑采用主动式。