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 ...
他们中多数人都有岁数不到学龄期的孩子。Most of them have young children below school age.他总是感觉不舒服。也是，他都这个岁数了。He gets funny turns, you know. It's his age.她看起来比她的岁数年轻.She looks young for her years....
The mechanism of electroless nickel deposition in sodium hypophosphite bath is discussed.探讨了次亚磷酸钠体系化学镀镍沉积机理.Electroless copper plating on PET fabrics using hypophosphite as reducing agent was investigated.研究了采用次磷酸钠作还原剂在涤...