Portraiture, once a luxury for the privileged few, was suddenly well within the reach of many more people.
肖像画曾经是少数有特权的人拥有的奢侈品，突然变成了更多人可以很容易接触到的事物。
We water the flowers once a week.
我们每周给花浇水一次。
We have to water this cactus once a month.
我们必须每月给仙人掌浇一次水。
The salt and gypsum, the faunal changes, and the unusual gravel provided abundant evidence that the Mediterranean was once a desert.
盐和石膏、动物群落的变化和不寻常的沙砾充分证明地中海曾经是一片沙漠。
A good tip for summer eating is to limit frozen treats like ice cream to no more than once a week.
一个夏季饮食的好建议是每周食用冰淇淋这样的冷冻食品不超过一次。
We tend to meet up for lunch once a week.
我们往往会每周共进一次午餐。
It was once a forgotten world, a small village and its bell tower.
这个小村庄和钟楼曾经是一个被遗忘的世界。
There was once a wise old lady who lived on a hill.
从前有一位住在小山上的聪明老太太。
There was once a man who had a daughter who was called Clever Elsie.
从前有一个人，他有一个女儿，名叫聪明的爱尔莎。
There was once a king's son who had a bride whom he loved very much.
从前，有一个王子，他有一个心爱的新娘。
There was once a one-legged dragon who said to the centipede, "How do you manage all those legs?''
从前有一条独脚龙，它对蜈蚣说：“你如何管理那么多腿？”
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。
每周读一本书。
Hey, it's a once a year celebration!
嘿，这是一年一次的节日！
There was once a man in South America who had a parrot, a pet bird that can imitate human speech.
从前，南美洲有个人养了一只鹦鹉，一种能模仿人类说话的宠物鸟。
We need to watch an English film at least once a month.
我们需要至少每月观看一次英语电影。
Tad reads books to the children at the Green Oaks School once a week.
泰德每周给绿橡树学校的孩子们读一次书。
Peter said joyously, "I do like moving! I wish we moved once a month."
彼得兴高采烈地说：“我喜欢搬家！我希望我们每个月搬一次家。”
In summer, we like to hang out at the beach and go surfing at least once a month.
夏天，我们喜欢在沙滩上闲逛，每个月至少冲一次浪。
The FUF's tree experts make "house calls" to every newly-planted street tree once a month.
“城市森林之友”（FUF）的树木专家每月对每棵新种植的街道树木进行一次“出诊”。
Taking exercise such as playing tennis in the gym at least once a week is beneficial to our health.
一周至少做一次运动，如在体育馆打网球，这对我们的健康有好处。
Saihanba in Hebei Province was once a desert, but now it has become the biggest man-made forest in China.
河北省的塞罕坝曾经是一片沙漠，但现在它已经成为中国最大的人工林。
Shashiyu was once a poor village in Hebei Province, but now it has changed into a rich and livable place.
沙石峪村曾是河北省的一个贫穷村庄，但现在它已经变成了一个富裕而又宜居之地。
People who see her on television now will find it hard to believe that she was once a shy girl who refused to speak up in class.
现在在电视上看到她的人，很难相信她曾经是一个在课堂上拒绝发言的害羞女孩。
The story is one of scores in To Forgive Design: Understanding Failure, a book that is at once a love letter to engineering and a paean to its breakdowns.
这个故事是《原谅设计：理解失败》中的一个片段。这本书既是给工程学献上的情书，也是对其工程故障的赞歌。
我每周同我爸通一回电话。
My mother cooks it once a week.
我妈妈每周都要做一次给我吃。
There was once a time when I had no fear.
我曾有过不知害怕的时光。
Jane wrote to her parents once a week.
简每星期给父母写封信。
It's a good idea to eat out once a while.
隔段时间在外面吃一顿真不错。
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