once a week

We water the flowers once a week.(我们每周给花浇水一次。)

My mother cooks it once a week.(我妈妈每周都要做一次给我吃。)

This patient got treated once a week.(这位病人一周做一次治疗。)

Water the plant once a week if you are to get fruit in the autumn.(如果你想秋天收获果实就要每周给植物浇一次水。)

We tend to meet up for lunch once a week.(我们往往会每周共进一次午餐。)

You should see your doctor every 2 weeks until 36 weeks, then once a week until you deliver the baby.(怀孕到36周前每隔两周要看一次医生，36周后开始必须每周都要去医生那儿检查一次，直到您分娩为止。)

The train operates the 2,400-mile round trip once a week.(这列火车每周进行一次2400英里的往返旅行。)

I do exercises for legs approximately once a week and most of my leg workouts include ballet movements and yoga stretching.(我大约每星期一次做腿部运动，而且绝大部分的腿部训练包括芭蕾舞步和瑜伽伸展运动。)

Lung cells die and are replaced about once a week.(肺细胞约每周死亡、更新一次。)

To help me with that task, Mrs. Pillar volunteered to come to the hospital and later to my house once a week.(为了帮助我完成那项任务，皮勒太太自愿每周去一次医院，然后到我家来。)