40. Studies of the gravity field of the Earth indicate that its crust and mantle yield when unusual weight is placed on them. 40.对地球引力的研究表明，在不寻常的负荷之下地壳和地幔会发生位移。
We all wear masks, and the time comes when we cannot remove them without removing some of our own skin.--André Berthiaume ------我们都带着面具生活，等到必须摘下来时，却发现已经再也揭不下来。——安德烈·柏瑟姆
42. The wallflower is so called because its weak stems often grow on walls and along stony cliffs for support. 42.墙花之所以叫墙花，是因为其脆弱的枝干经常要靠墙壁或顺石崖生长，以便有所依附。
43. It is the interaction between people, rather than the events that occur in their lives, that is the main focus of social psychology. 43.社会心理学的主要焦点是人与人之间的交往，而不是他们各自生活中的事件。
44. No social crusade aroused Elizabeth Williams’ enthusiasm more than the expansion of educational facilities for immigrants to the United States. 44.给美国的新移民增加教育设施比任何社会运动都更多的激发了
45. Quails typically have short rounded wings that enable them to spring into full flight instantly when disturbed in their hiding places. 45.典型的鹌鹑都长有短而圆的翅膀，凭此他们可以在受惊时一跃而起，飞离它们的躲藏地。
46. According to anthropologists, the earliest ancestors of humans that stood upright resembled chimpanzees facially, with sloping foreheads and protruding brows. 46.根据人类学家的说法，直立行走的人的鼻祖面部轮廓与黑猩猩相似，额头后倾，眉毛突出。
Understand me people don't need me to explain that don't understand my people I don't need to explain. ------ 有时候不是不懂，只是不想懂；有时候不是不知道，只是不想说出来；有时候不是不明白，而是明白了也不知道该怎么做，于是就保持了沉默。
The difference between giving up and letting go. Giving up is sacrificing what was rightfully yours, letting go is forgetting what was never yours. ------ 放弃与放手的区别：放弃是牺牲本来属于你的，放手是放下那些从来不是你的。
