2 sentences

1. 长期超负荷工作对身体有害。

   cháng​qī chāo​fù​hè gōng​zuò duì shēn​tǐ yǒu​hài.

   Working under overload for a long time is harmful to the body.

   Source: Dong Chinese Dictionary

2. 他为了养家长期超负荷工作，终因积劳成疾而病倒了。

   tā wèi​le yǎng​jiā cháng​qī chāo​fù​hè gōng​zuò, zhōng yīn jī láo chéng​jí ér bìng​dǎo le.

   He worked excessive hours for a long time to support his family and finally fell ill due to overwork.

   Source: Dong Chinese Dictionary