2 sentences

1. 他在矿场干这种苦力已经好几年了。

   tā zài kuàng​chǎng gàn zhè zhǒng kǔ​lì yǐ​jīng hǎo​jǐ nián le.

   He has been doing this kind of hard labor at the mine for several years.

   Source: Dong Chinese Dictionary

2. 旧社会有很多中国人被骗到海外去当苦力。

   jiù shè​huì yǒu hěn​duō Zhōng​guó​rén bèi piàn dào hǎi​wài qù dāng kǔ​lì.

   In the old society, many Chinese people were tricked into going overseas to work as coolies.

   Source: Dong Chinese Dictionary