Most information was collected by direct observation of the animals' behaviour.
大部分信息都是通过直接观察动物的行为收集到的。
This product has not been tested on animals.
这种产品尚未在动物身上试验。
His research work was attacked by animal rights activists.
他的.研究受到了动物权益维护者的抨击。
I can't stand people who are cruel to animals.
我无法容忍虐待动物的人。
The time has come for action if these beautiful animals are to survive.
若要使这些美丽的动物能生存下去，现在就要行动起来。