.Unit 4 Wildlife protection【短语归纳】：1.die out 灭亡；逐渐消失2.in peace和平地；和睦地；安祥地3.in danger (of) 在危险中；垂危4.in relief如释重负；松了口气5.burst into laughter 突然笑起来；大声笑了出来6. protect.from 保护 不受(危害)7. pay attention to注意e into being 形成；产生9.according to 按照；根据 所说10.so that以致于；结果【知识点总结】：1. Their numbers maydecrease.decrease vi. & vt.减少；（使）变小或变少 .decrease to减少至 decrease by减少了 e.g. By 1881, the population of Ireland had decreased to 5.2 million. Student nu
