该是母鸡孵蛋的时候了.It is time for hens to brood.是母鸡孵蛋的时候了.It's a time for hens to brood.这化石显示,早在鸟类出现之前,孵蛋的行为就已经演化出来.The fossil demonstrates that brooding behavior evolved long before there were birds....
Look at the information that precedes the paragraph in question...查看正在讨论的这段文字前面的信息。Look at the information that precedes the paragraph in question.查看正在讨论的这段文字前面的信息。A major precedes a captain in rank.少校军阶高于上尉.A precedes B...