chromosome – n. the part of a cell that contains the genes which control how an animal or plant grows and what it becomes

groundbreaking – adj. introducing new ideas or methods

appropriate – adj. right or suited for some purpose or situation​

topic – n. a subject or issue

factor – n. one of the things that causes a result
 2/3   首页 上一页 1 2 3 下一页 尾页