艰巨

cǐ cì rèn wù fēi cháng jiān jù

此次任务非常艰巨。

The task is very arduous.

zhè ge gōng chéng shí fēn jiān jù

这个工程十分艰巨。

This is a formidable project.

zhè fèn gōng zuò duì sān gè xiǎo nán hái lái shuō shì jiàn jiān jù de gōng zuò

这份工作对三个小男孩来说是件艰巨的工作。

This job is a large order for three small boys.

jiān jù de láo dòng

艰巨的劳动

tremendous efforts