children frolicking on the beach在海滩上嬉戏的儿童Little Bao was happy as a puppy frolicking in the snow.小小宝快活得好像雪天的小狗.When they meet their tamed brothers, they rub noses and mingle with them, grazing and frolicking.它们对许多牧马都熟悉, 相...
这是及格和不及格的差别.It'sthe difference between a pass and a fail.我二年级时数学不及格。I flunked math in second grade.要是下次作业你再马马虎虎, 我话说在头里,可要给你打不及格了.If you do such sloppy work again, I promise I'll fail you....