brood
/bru:d; brud/ n [C, Gp]
1 all the young birds or other animals produced at one hatching or birth （一窝孵出的）幼鸟; （一次产出的）动物
a hen and her brood (of chicks) 母鸡和它的一窝小鸡.
2 (joc 谑) family of children 一家的孩子
There's Mrs O'Brien taking her brood for a walk. 奥布赖恩太太领著她那群孩子散步呢. brood, v
1 [I] (of a bird) sit on eggs to hatch them （指鸟）孵雏.
2 [I, Ipr] ~ (on/over sth) think (about sth) for a long time in a troubled or resentful way 忧闷地沉思（某事物）
When he's depressed he sits brooding for hours. 他消沉的时候, 就坐著沉思几小时.
It doesn't help to brood on your mistakes. 对所犯的错误耿耿於怀是无济於事的.