The Room Temperature Section of the Phase Diagram of Co-Ge-Sn Ternary System

The room temperature section of the phase diagram of Co-Ge-Sn ternary system has been determined by means of X-ray powder diffraction method.The section determined consists of 12 single-phases,22 two-phase regions,and 11 three-phase re- gions.Two new phases,called δ and η respectively in this paper,have been found.The former is a binary phase with invariable composition(80.46at%Sn)corresponding to formula CoSn_4,and the latter is a ternary phase occuping a homogenous range.The experimental data also show that Co_2Ge phase has a smaller region than that in Ref.1,2,while β-Sn,Ge,CoSn,CoSn_2 and Co_2Ge_3 are phases with invariable compositions.

The Room Draw

本文专讲美国大学校园的“住”。 一位美国教授在读了毛小姐的这篇文章后写了这样一句评语:She truly hasa good eye for detail and good command of English.这个评价是公允的。细读本文,我们就会为作者对校园生活的入微的观察和练达幽默的英语文笔所吸引。 美国大学生住哪幢楼,哪个寝室,是抽签决定的。这使我们感到新鲜有趣。 毛小姐认为: Every year,Carleton students change dorms,meet new people,and havenew experience.Some are trivial,but some may influence their whole lives.Many years later,they would still remember things that happened in" thatroom". 这是千真万确的。大学里和谁同室而居,终生难忘,而且有时会左右我们的命运。 始料未及的是,Watson的墙壁如此之薄,目的是为了让女孩们互相“监督”彼此的行为举止。 毛小姐有幸在该寝室居住,她的感觉是:That made me reallyuncomfortable because it is like compulsory eavesdropping(被强迫的偷听). 更让我们不解的是,性开放的美国校园在30年之前的情况是:It is amazingthat until the 1960s, males and females still ate in different cafeterias in thisschool. 毛小姐能在行文中运用若干英语修辞手法。