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1.upper-class上层社会
My mother was born into an upper-class American family.
我的母亲生长在一个上层阶级的美国家庭。
2.joined together结合
The most striking eyes among the reptiles have lower and upper eyelids joined together, leaving one large hole for the pupil to see through.
最令人震惊的是蜥蜴的上下眼睑是连在一起的，这特点让它的眼睛只留下了一个比较大的孔瞳孔接收光线。
3.fighting against反对
Libyan doctors treat an injured rebel, who was wounded during the fighting against pro-Qaddafi fighters, at a hospital in the town of Ras Lanouf, eastern Libya, Tuesday, March 8, 2011.
2011年3月8日，星期二，利比亚东部，在拉斯拉纳夫镇的一家医院内，医生们对一名受伤的反叛者进行治疗，他是在与卡扎非支持者的战斗中负伤的。
4.calling for要求
The crew of the ship are calling for a raise in pay.
这艘轮船上的全体船员正在要求增加工资。
5.turned into变成
The exploration of a new world has turned into business as usual.
对新世界的探索已经转变成了寻常的商业行为。
