As the mother struggles to keep herprize,母亲拼命要保住它的战利品时

struggle的常见用法：

1、是不及物动词,与介词against连用,表示“同与之对立或对抗的人或物进行斗争”; 与介词for连用,表示“为…而斗争”。

They have learned to struggle against adversity.

他们已经学会同逆境做斗争。

They were poor and had to struggle for a living.

他们很穷，必须为生活而挣扎。

2、struggle可接动词不定式作目的状语。

词义辨析:struggle against, struggle with这两者都有“反抗”的意思。其区别是：

struggle against指在艰苦的环境下奋起反抗或斗争; struggle with指试图控制或征服对方。

He failed to struggle against temptation.

他没能经住诱惑。

His life was a hard struggle with sickness.

他一生跟疾病作了艰苦的斗争。

The mother doesn't know that her hungry young are leaving their nest in search of a better provider.做母亲的不知道它饥饿的孩子正离开巢穴寻找更好的供养者

in search of寻求； 寻找

I went in search of a doctor for my sick wife.

我去请医生为妻子看病。

The scientists are in search of a new element.

科学家们正在寻找一种新元素。

She returns to find that her nest is empty.它回来了，却发现巢穴空空如也

return to回到

Exiles long to return to their native land.

流亡者们渴望回到自己的祖国。

I'll return to this point in my lecture in a little while.

过一会儿我还要回过来讲这个问题。