这个问题让我伤了整整一天脑筋.
For a while he let his eyes idly follow the preying bird.他自己的眼睛随着寻食的鸟毫无目的地看了一会儿.
Now environmental protection is more preying than ever before.现在,环境保护比以往任何时候都更为紧迫.
This matter has Been preying on my mind all day.这个问题整天萦绕在我的心头.
My mother's illness has been preying on my mind.我母亲的病一直困扰着我.
Next week's test has been preying on my mind.下周的测验一直困扰着我.
They are also preying on penguins and South American fur of the young sea lions.它们还捕食企鹅和南美毛皮海狮的幼崽.