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1. They are called virtual particles in order to distinguish them from real particles,whose lifetimes are not constrained in the same way,and which can be detected. 它们被称为虚粒子，以便与实粒子区分开来，而实粒子则不会以这种方式受到制约，并且其存在可得以测定。 难句类型：复杂修饰、插入语 解释：本句的怪异在于：real particles后面跟着两个定语从句，都是同时修饰real particles的，而且两个从句之间不用逗号隔开，却又加上and连接，令人一眼看上去极不习惯。 意群训练：They are called virtual particles in order to distinguish them from real particles,whose lifetimes are not constrained in the same way,and which can be detected. 2. Open acknowledgement of the existence of womens oppression was too radical for the United Stated in the fifties, and Beauvoirs conclusion , that change in womens economic condition , though insufficient by itself , remains the basic factorin improving womens situation , was particularly unacceptable . 公开对妇女压迫的存在的承认对于50年代的美国而言有些过分激进，而且B的结论，即妇女经济状况的变化，经管它本身不是一个充分的因素，但是仍然是提高妇女地位的根本因素的观点，尤其无法令人接受。 | 
