奋战

fèn zhàn yī nián

奋战一年

fight bravely for a year

fèn zhàn dào zuì hòu

奋战到最后

fight to the bitter end

fèn zhàn yī gè yuè

奋战一个月

work without a letup for a month

jīng guò sān gè yuè jiān kǔ fèn zhàn dà jiāng zhōng yú jié liú chéng gōng

经过三个月艰苦奋战，大江终于截流成功。

After three months' strenuous labour, we finally succeeded in damming the great river.

yīng yǒng fèn zhàn

英勇奋战

fight bravely

yù xuè fèn zhàn

浴血奋战

fight a bloody battle

tā wèi zhēng qǔ jiǎng xiàng ér fèn zhàn

他为争取奖项而奋战。

He battled it out for the prize.

tā zài yī cì jī zhàn zhōng fèn zhàn ér sǐ

他在一次激战中奋战而死。

He died in the last ditch in a fierce battle.