Animal's help to human
动物───animal;人类───human beings
The dolphin is an intelligent animal.───海豚是聪明的动物。
Near the end of Devonian times, thirty percent of all animal life vanished.───在泥盆纪末期，30％的动物物种都灭绝了。
It may be safely assumed that there is no animal life on Mars.───可以有把握地认为火星上是没有动物生命的.
Animal husbandry on the grassland is developing rapidly.───草原上的畜牧业在迅速发展.
A cat is a tame animal.───猫是一种温顺的动物.
It is pitiful to see that the life of an animal in a zoo is spent in an locked iron cage.───看到动物园里的动物一生都被关在铁笼子里,真是令人可怜.
The grain just rotted and all they could use it for was animal feed.───谷物完全烂掉了，他们能将其派上的唯一用场就是作动物饲料。
The artist recorded interviews on a variety of topics and modelled an appropriate animal for each voice.───这位艺术家把关于各种话题的访谈录了下来，并为每种声音塑造了一个贴切的动物模型。