In its place are niggling doubts about whether the recovery can be sustained.

代之的是对经济复苏能否持续的质疑。

Even his fans would not say that Mr Davies's forte is details; some niggling errors deserve speedy correction.

戴维斯的粉丝并不认为新书的特点在于资料的详细。书中的一些小错误应该及时更正，因为著书过程中再所难免有些笔误。

And then there's a niggling problem with the cooker ... Ah ha ... The door's broken.

然后电饭锅出点小问题… … 啊哈… … 门坏。

You can do it twice a day and if you feel any niggling injuries coming on, foam rollers are a fantastic place to start.

你可以一天做两次，如果你觉得可能会有小伤出现，泡沫轴是一个很好的开始。