比如说? For example?For instance? 隔多长时间? How often? *“隔几分钟来一趟车”或者“隔多长时间打一次网球”等用于询问时间的间隔时。How often should I take this medicine? (这药一天吃几次?)Five times a day. (一天5次。)How frequently? U.S.A.是什么的缩写? What does USA stand for?What does USA stand for? (U.S.A.是什么的缩写?)It stands for the United States of America. (它是United States of America的缩写。) 多长? How long? *询问距离、尺寸时间的长短，听到这样的提问，对方以具体数字回答。How long have you dated her? (你和她交往了多长时间?)About four years. (大概4年吧。)How long is her hair? (她的头发有多长?)Very long. (很长。)*不能用具体数字回答时，也可以用类似very long这样的话来回答。