Unit 4Wildlife protection野生的；野的；未开发的；荒凉的 笑；笑声 确定的；某一；一定 保护区 收入 凶猛的；猛烈的 结局；结尾 hunt relief rub insect powerful dust decrease contain container affect effect affection appreciate appreciation succeed success successful successfully harm harmful harmfully employ employee employer mercy merciful merciless protection protect loss lose loser lost respond response distant distantly distance attention attend secure security bite bit bitten inspect inspection inspector out in from to into to into in in as the WWF suggests the way the bones were joined together It is a pity that there are very few left affects have an effect on/upon taking it passing a succeeded as successfully writing to work a in contain containing at merciful without in harm you do harm to/are harmful to for was (should) see to at into out out down improving be paid fixed from against into into in in As Strange that/which Is this the way before before before leading folded decrease relief employ affect contained cooperating protection out success distance employed后加himself或employed前加been whileas/though which前加in或whichthat或去掉which affecteffect aboutto in danger of died away came into being at the mercy of According to in peace in relief so that pay attention to burst into laughter called with who stomachs endangered to have destroyed more a rubbing her has affected the number of wild animals have died out in danger has paid attention to the situation has taken a series of measures has come into effect succeed in preventing the situation (from) getting worse 谢谢观看！