苦战

áo yè kǔ zhàn

熬夜苦战

stay up to work hard

gōng rén men kǔ zhàn yī gè yuè zuì zhōng fā míng le yī xiàng xīn gōng yì

工人们苦战一个月，最终发明了一项新工艺。

After a month of hard work, the workers finally developed a new type of technology.

tā wèi kǎo shàng dà xué jīng cháng tōng xiāo kǔ zhàn

她为考上大学经常通宵苦战。

She often worked throughout the night in order to be able to pass the college entrance examination.

dà jiā jué xīn kǔ zhàn wǔ nián gǎi biàn shān qū de miàn mào

大家决心苦战五年，改变山区的面貌。

We are determined to carry on a bitter struggle to transform the mountain area in five years.