每周两次 twice a week ; biw ; semiweekly ; two times per week

每周一两次 once or twice a week

玛丽每周看两本书 Mary weekly book ; Mary weekly reading two books

每周购物两次 Shop twice a week

我每周吃两次 I eat twice a week

她每周购物两次 Her weekly shopping two

汤姆每周上两次网 Tom twice weekly network ; Tom every week two web

就是每周休两天假 Is week two days holiday

练习跑步每周两次 Practicing running twice weekly

每周游泳两次 Swimming twice a week ; Swim twice a week