下面就是新东方在线雅思频道为大家收集整理的雅思写作常用词汇：生态平衡/替代方法，供大家参考。更多雅思报名官网的最新消息，最新、最专业的雅思备考资料，新东方在线雅思频道将第一时间为大家发布。

　　ecological balance/equilibrium[生态平衡]

　　- eg: Animals need to be treated with a humane attitude as they are essential to the ecological balance.;

　　alternative method[替代方法]

　　- eg: Computer stimulation is a great alternative method of animal testing.。