Most information was collected by direct observation of the animals' behaviour.

　　大部分信息都是通過直接觀察動物的行為收集到的。

　　This product has not been tested on animals.

　　這種產品尚未在動物身上試驗。

　　His research work was attacked by animal rights activists.

　　他的研究受到了動物權益維護者的抨擊。

　　I can't stand people who are cruel to animals.

　　我無法容忍虐待動物的人。

　　The time has come for action if these beautiful animals are to survive.

　　若要使這些美麗的動物能生存下去，現在就要行動起來。