I was working all hours and constantly fretting about everyone else's problems.我一刻不闲地工作，总是为别人的事操心。Fretting about it won't help.苦恼于事无补。The old lady is always fretting over something unimportant.那位老妇人总是为一些小事焦虑不安....
The old lady is always fretting over something unimportant.那位老妇人总是为一些小事焦虑不安.I was working all hours and constantly fretting about everyone else's problems...我一刻不闲地工作，总是为别人的事操心。I was working all hours and constantly ...
The system is designed to realize the subdividing drive, adjusting and position.实现细分驱动器 、 调速控制、定位控制和软硬接口的设计.Subdividing it , says Mr. Forsyth,'would destroy it.福塞斯先生说: “ 拆开卖会毁了它. ”The algorithm can be used to higher...