Wagon trains — groups of wagons — rode in four lines across the land when they passed through dangerous country. If attacked, the wagons could quickly form a circle for defense.
马车队(即一群马车)，当他们经过危险区时，他们排成四排向前行进，如果遭受到攻击时，这些马车就会很快地形成一个保护圈进行抵抗。
It also doesn’t help that here above the Arctic Circle we were getting only about four hours of dusklike sunlight a day.
这儿是北极圈以北的地区，一天当中大约只有四个小时暮气沉沉的阳光，对游客不甚方便。
The idea is to circle the globe in five stages, each taking four or five days of continuous flight (which is about as much as a pilot could endure).
这个环球飞行计划分为五个阶段，每个阶段用时四到五天（这也是一个飞行员所能忍受的极限了）。
In the picture, we can see four circles composing a square, each circle just touches the other two circles.
在画中，我们可以看到四个圆组成了一个正方形，每个圆恰好和其他两个圆接触。
Listen to the four choices, then draw a circle under the right one.
听四个选择，然后在正确的下面画一个圈。
On Tuesday, he revealed his plans for Apple's (AAPL) new earthly headquarters: a four-story circle of glass big enough to house 13, 000 employees.
周二，他又宣布了苹果(Apple)将建造新总部的计划：一座四层高的圆环状玻璃建筑，足以容纳13,000名雇员。
When people are in a romantic relationship, instead of having the typical five inner circle friends on average they have only four.
人一开始谈恋爱了，你的密友人数就从5个下降到4个了。
Listen to the four choices, and then draw a circle under the right one.
听四个选择项，然后在正确的下面画一个圈。
Developed a feeding nozzle which have four double-feeding pipes with co-axial shaping gas distributes on circle orientation of laser beam with uniformity and symmetry.
研制了一种在以激光束为中心轴的圆周方向均匀对称分布四个具有同轴汇聚气的双层送粉管的送粉喷嘴。
But after building up a solid circle of friends for four years, you may have a few hunches about where your classmates will end up.
但是在经过四年朝夕相处的朋友中，你可能会对同窗的归属有些预感。
A square has four sides but a circle has no sides.
正方形有四条边，然而圆形没有边。
The back had a gravel driveway with a four-car garage, a nice lawn with a swing set, and, on both sides of the driveway, sloping lawns that went down to the street, Circle drive.
房子后面有一条碎石铺成的车道，一个可停放四辆车的车库，一块漂亮的草坪，草坪上立着秋千架，车道两边则是草坪坡地，一直延伸到环路街上。
A man who wears a motorcycle hat and is dressed in thick clothes sits safely self-composed operate azimuth circle in simple and crude"four-wheeler car".
一个戴着摩托车帽子、穿着厚衣服的男子坐在简陋的“四轮车”内安然自若操控着方向盘。
When we say "everlasting delight", we are contradicting ourselves no less than when we call a circle four-cornered or a motion motionless.
我们说永远快乐，正好像说四方的圆形，静止的动作同样地自相矛盾。
Based on the synthesis theory concerning the mixed point straight-line four-bar linkage in the special condition, a research method with the circle center and circle point as parameters is proposed.
对在特殊条件下混合点直线四杆机构的综合进行了研究，以圆心、圆点坐标为研究混合点直线四杆机构的参数，推导出一般条件下的综合公式并用实例验证了公式的正确性。
A complete and ideal teaching situation is a four-fold structure which consists of Needs - Motivation Circle, Tasks - Case Circle, Conditions - Information Loop and Cognitive - Practice Space.
实践圈有机结合而成的四重结构，包含背景、案例、任务、工具、需要、目标、条件等要素。
A complete and ideal teaching situation is a four-fold structure which consists of Needs - Motivation Circle, Tasks - Case Circle, Conditions - Information Loop and Cognitive - Practice Space.
实践圈有机结合而成的四重结构，包含背景、案例、任务、工具、需要、目标、条件等要素。
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