The Public Utilities Commission inspects us once a year.
公用设施委员会每年到我们这里视察一次。
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。
Some birds which were once a common sight are now becoming rare.
有些曾经随处可见的鸟类现在日益稀少。
He cleans his car once a week.
他每周洗一次汽车。
He comes to see us once a week.
他每周来看望我们一次。
我每周做一次有氧健身运动。
The village was once a pirates' lair.
这个村子曾一度是海盗藏匿之处。
The snake sheds its skin once a year.
蛇一年蜕一次皮。
Once a week, a maid changes the sheets.
女仆每个星期换一次床单。
Venice was once a city of rich merchants.
威尼斯曾是富商云集的城市。
We tend to meet up for lunch once a week.
我们往往会每周共进一次午餐。
Lung cells die and are replaced about once a week.
肺细胞约每周死亡、更新一次。
I fill up the tank with gasoline about once a week.
大约每个星期我加满一箱汽油。
"Once a detective, always a detective," he said lightly.
他轻松地说：“一朝是侦探，终身是侦探。”
Many people have made it a rule to detoxify once a year.
许多人已经养成了每年进行一次身体解毒的习惯。
The town's only claim to fame is that there was once a riot there.
这个镇唯一出名之处就是那里有过一次暴乱。
About two-thirds of adults consult their doctor at least once a year.
大约三分之二的成年人一年至少看一次医生。
The Tourist Board inspects all recommended hotels at least once a year.
旅游局至少每年视察一次所有举荐的旅馆。
Once a model has made it into the major league every detail is mapped out by her agency.
模特儿一朝成名后，她的一切细节将由其经纪人安排。
She always writes me once a month, if only to scold me because I haven't answered her last letter yet.
她总是一个月写一封信给我，即使仅仅是为了责备我还没有回她的上一封信。
Steven visited his grandma once a month.
史蒂文每月看望奶奶一次。
They used to meet once a week.
他们过去一星期见一次面。
We play it together once a week.
我们每周一起玩一次。
I usually have fast food once a week.
我通常一周吃一次快餐。
Once a month, he took one small drop.
他每次服用一小滴，每月一次。
Once a week my business suit is smoothly ironed.
我的西装每周都要平整地熨一次。
We water the flowers once a week.
我们每周给花浇水一次。
每周读一本书。
Hey, it's a once a year celebration!
嘿，这是一年一次的节日！
她曾经当过出纳员。
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