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This paper studied the case that there is a known point of tangency of a circle and a parabola while the center of the circle is on the recession of the parabola. 应用数形结合的方法,研究了已知圆与抛物线有一个切点,而圆心在切点处抛物线的凹向的情形。
The deepest known point on the Earth is at the bottom of the Mariana Trench, a depression in the floor of the western Pacific Ocean, southeast of Japan. 地球上最深的地方就是西太平洋海底的马里亚纳海沟，在日本的东南面。
The location of an unknown point,as in navigation,by the formation of a triangle having the unknown point and two known points as the vertices. 三角测量通过以分别作（顶点）的两个已知点和一个未知点形成一个三角形，来求出或定位该未知点，如在航海中。
The location of an unknown point, as in navigation, by the formation of a triangle having the unknown point and two known points as the vertices. 三角测量通过以分别作（顶点）的两个已知点和一个未知点形成一个三角形，来求出或定位该未知点，如在航海中
The article demonstrates the relation between the precision of resection point of trilateration space and three known points from theory and practice. 本文从理论与实例论证了测边空间后方交会点的精度与三个已知点的关系，为选择交会点提供了技术依据。
With the color and luminance difference of wheat field and outside the field, the position of field edge and the candidate points of it could be detected; the slope of the field-edge was calculated by using passing a known point Hough transform. 根据麦田和田外区域的不同颜色及亮度特征，判断出田埂的位置以及田埂线的方向候补点群，使用过已知点的哈夫变换计算出田埂线的斜率。
He professed to know nothing about the matter. 他声称对此事一无所知。
When it comes to German, I know nothing. 谈到德语，我一窍不通。
Nothing is known of the authorship of the book. 无人知道该书是何人所写。
He was known to be a young man with lofty ideals. 人们都知道他是一个有抱负的青年。
I take it you know what a stethoscope is. 我想你知道听诊器是个什么东西。
The place is known for its handicraft products. 这地方因出手工艺品而出名。
I know where the picturesque old-world village is. 我知道那个风景如画的古老村寨在哪儿。
It's known as the most dangerous part of the city. 那地方都知道是市内最危险的地段。
He's sometimes been known to sit there all day. 有时能见到他整天坐在那里。
That iron is a good conductor is known to us all. 铁是良导体这是我们大家都知道的。
People in this town know him as a lunatic. 这个镇上的人们称他为疯子。
Now I know where to go when I feel homesick. 现在我知道想家的时候该去哪儿了。
I know all the ins and outs of our school building. 我知道我们教学大楼的一切情况。
And you come from North Dakota! I want to know. 原来你是北达科他州来的！真想不到！