他具体地观察了拉尔夫·斯宾塞的一举一动。
一个鸟类观察者用他的大望远镜观察他的一举一动，没人知道为什么。
A birdwatcher kept an eye on his activities with his large binoculars. Nobody really knows why.
一个鸟类观察者用他的大望远镜观察他的一举一动，没人知道为什么。
A birdwatcher kept an eye on his activities with his large binoculars.Nobody really knows why.
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