He is known for familiar results in elementary geometry; for example, the Euler line through the orthocentre (the intersection of the altitudes in a triangle), the circumcentre (the centre of the circumscribed circle of a triangle), and the barycentre (the "centre of gravity," or centroid) of a triangle.

他作了很大努力來(lái)發(fā)展一個(gè)較完整的月球運(yùn)動(dòng)理論久热这里只精品99国产6，它由於包含了三體問(wèn)題而特別困難呦齿微信群；在1753年發(fā)表的部分解答曾幫助了不列顛海軍部對(duì)月球表的計(jì)算婷婷丁香五月天欧美中文。1772年在线免费a，通過(guò)艱鉅的心算完成了他的關(guān)於月球運(yùn)動(dòng)的第二種理論欧美性爱v。

After I came back to my working unit and familiar circle, every thing became strange to me. Many things I used to feel comfortable with became uncomfortable to me.

一回到單位91中国老熟女的大屁股，一回到熟悉的圈子，卻漸漸有了一種陌生感аⅴ天堂中文在线，對(duì)以前許許多多習(xí)以為常的事激情图库，開(kāi)始有了逆向的思考。

Lick your hand, think of me in all my familiar places, think about all the pieces of string, think about the cotton and the rose, think about how the inside of the circle is not different from the outside of the circle.

舔舔你的手JIZZ日本ZZ2护士，想想我在所有我熟悉的地方免费观看的黄色视频网址，想想所有的繩子。