知识贝壳
知识贝壳
所属栏目：英汉双解生物学
Changes in thestructure or function of an organ or systemduring the life of an organism,brought aboutby the use or disuse of that organ or system,or by environmental influences. For exam-ple,sportsmen may develop strong muscles,and plants growing near coa ......（本文共 431 字 ） [阅读本文] >>