tā / nián / qīng / shí / zài / jī / céng / mō / pá / gǔn / dǎ / jī / lěi / le / fēng / fù / de / gōng / zuò / jīng / yàn

他年轻时在基层摸爬滚打，积累了丰富的工作经验。

He gained rich work experience through years of tough grassroots work when he was young.