An earthworm is a terricolous organism.蚯蚓是陆生的生物.The earthworm population had declined by 70 %.蚯蚓数量下降70%.The oral opening in an earthworm is small.蚯蚓的口是很小的....
She always identifies with the underdog.她总是同情受害者." But often the underdog gets more sympathy from the bystanders. "“ 可是,战败者常常得到旁人更大的同情—— ”The underdog team scored two surprise goals.处于劣势的一队出人意料地进两球....
记住：保持乐观的心态，好事自然会发生。Remember, keep a positive attitude and good things will happen.请记住，幸福不在于你是谁或者你拥有什么，而仅仅取决于你的心态！Remember, happiness doesn't depend upon who you are or what you have; it depends solely upon what you ...
其它淋巴系统疾病包括淋巴球性白血病与淋巴瘤.Other lymphatic system disorders include lymphocytic leukemias and lymphoma.每个淋巴球在表面都有受体分子,可结合成一种特殊的抗原.Each has receptor molecules on its surface that Bind to a specific antigen.淋巴球: 对免疫系统至为重要的一型白血球...