大家都搜：
多长时间一次
1、how often is───多久一次
2、it often───它经常
3、often do───经常做
4、often class───经常上课
5、smile often───经常微笑
6、most often least often───通常最不经常
7、often protected───经常受到保护
8、how do you often───你经常做什么
9、often───adv.常常，时常；往往，大多
1、How often do you go swimming?───你多久去游泳一次？
2、Some employees need more interaction than others, so it's your job to determine how much to provide, to whom, and how often.───有些雇员比其他人需要更多的交流。所以，决定给谁支持、给多少、频率又是多少就成了你的工作。
3、It's just a matter of how, how much, where, from whom, how often.───只有一个要领就是怎样买，多少钱，在哪买，从谁那，多久一次。
4、You want to understand how often these large flares happen: once a month, a year a millennium?───你想要了解这些大耀斑发生的频率吗？是一个月一次，一年一次还是一千年一次？
5、This procedure sums up the collected trace and lists how often a given stored procedure was called and how much time passed for all calls.───该过程总结收集到的跟踪，并列出调用给定存储过程的频率，以及所有调用总共花费的时间。
6、Boat buyers tend to overestimate how often they'll set sail and minimize how much the boat will cost.───船买家偏向于高估他们每每将解缆，裁减多少船的费用。
7、How often should you order, and how much, to minimize the total of your ordering and storage costs?───应该怎么来订货，每次多少，才能尽量减少您的订购和储存费用总额？
8、How often do you go to church ?───你多久去教堂ZuoYiCi礼拜？
9、How often do you go riding?───你多长时间骑一次马？
1、How often do you use the bus?
2、How often should I take this medicine?
3、Regardless of how often I correct him, he always makes the same mistake.
4、How often do the trains come?
5、How often do you take a bath?
6、How often do you go there?
7、How often do you think he changes his shirt?
8、How often do lions breed?
9、How often do you go to the theatre?