这身衣服你需要用三米布料。
我们需要为三年级学生制订一个新的课程大纲。
从一个机器人发展到多重机器人，你需要所有那三个构想。
To go from one robot to multiple robots, you need all three of those ideas.
你需要每三个月就换一次洗发水吗？
你要参加这个大学教程，就需要通过三科高级证书考试。
较大的图画需要两到三张底片来覆盖。
Larger drawings tend to require two or three exposures to cover them.
我们需要注意的主要有三个问题。
There are three main issues that we need to direct our attention to.
兑现支票通常需要三个工作日。
飞行时间大约需要三小时。
无论你走哪一条路都需要三个小时。
你需要能自证公民身份的证件，旧护照或出生证明都可以，另外还需要三张个人照片。
You need proof of citizenship, either an old passport or a birth certificate and three photographs.
我需要三个橘子。
我需要至少三个小时。
全国有三分之二的农田需要新的农民。
There are two-thirds of the nation's farmland in need of new farmers.
哦，但是我们还需要第三把椅子——你认为罗特麦耶小姐会不会一起来呢？
Oh, but we need a third chair—or do you think that Miss Rottenmeier won't come, perhaps?
超过三分之一的妈妈认为她们需要更多的训练，大约一半的妈妈说她们想念和朋友出去的时候。
Over a third of mums felt they needed more training and around half said they missed going out with friends.
要想长得高大，一棵树需要具备三个条件：合适的育苗地点、良好的生长条件和大量低成虫死亡率的时间。
To achieve giant stature, a tree needs three things: the right place to establish its seedling, good growing conditions and lots of time with low adult mortality.
不需要额外培训学生可以将他们堆积如山的债务削减三分之一。
Students who do not need the extra training could cut their debt mountain by a third.
申请研究生院需要三封推荐信。
Three letters of recommendation are required to apply to graduate schools.
一旦野兔数量减少，嫩枝的数量需要两到三年的时间来恢复。
Once the hare population has declined, it takes two to three years for the quantity of twigs to recover.
要掌握她所分析的材料所需的读写能力，至少需要三年的学习时间。
At least three years' study would be necessary to achieve the literacy competence necessary to grapple with the material she analyzes.
由于改变了训练计划，需要大约三周到一个月的时间才能注意到自己体重的明显变化。
It takes about three weeks to a month to notice significant changes in your weight due to altering your training program.
第三，你需要做眼保健操。
第三，他们不需要自己去商店。
例如，如果你想拼写“fun”，你需要摆出三个形状。
For example, if you want to spell "fun", you need to make three shapes.
他们需要三思而后行，为自己做出正确的决定。
They need to think before they act and make good decisions for themselves.
你需要做的是把一个球踢进三个绿色的气球里。
What you need to do is to kick a ball into each of the three green balloons.
一个三岁的孩子可能需要他人帮助，才能理解其他孩子也和他一样会感到疼痛，用玩具重重地打了玩伴的头是需要道歉的。
A three-year-old might need help in understanding that other children feel pain just as he does, and that hitting a playmate over the head with a heavy toy requires an apology.
有三点需要牢记。
有三点需要牢记。
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