1.Now we must also examine the culture as we Mexican Americans have experienced it , passing from a sovereign people to compatriots with newly arriving settlers to , finally ，a conquered people – a charter minority on our own land. (难度系数5 -)
现在我们必须也按照我们墨西哥裔的美国人的经历来审视这个文化，，在最终沦落成为一个被征服的民族——在我们自己的土地上的契约的少数民族。 难句类型：复杂修饰、插入语、固定搭配
2. It is possible to make specific complementary DNA’s (cDNA’s)that can serve as molecular probes to seek out the messenger RNA’s (mRNA’s)of the peptide hormones. If brain cells are making the hormones，the cells will contain these Mrna’S. If the products the brain cells make resemble the hormones but are not identical to them，then the cDNA’s should still bind to these mRNA’s，but should not bind as tightly as they would to mRNA’s for the true hormones. (难度系数4)
科学家可以制造出特异的(specific)互补DNA’s(cDNA’s)，以此作为分子探子(molecular probe)，探觅出肽激素的信使RNA’s(mRNA’s)。如果大脑正在制造着肽激素，则细胞就会含有这些信使RNA’s.假若细胞所制造的产品类似于肽激素但并非与这些肽激素全然相同，那么，互补cDNA’s应仍然和这些信使mDNA’s粘结的程度。含有这些mRNA’s的脑细胞然后就可以被分离开来，研究者可对其信使RNA’s进行解码，以确定它们的蛋白质产品究竟是什么，并确定这些蛋白质产品在何种程度上类似于真正的肽激素。