2 sentences for 劳累 (láo​lèi — toil)

1. 长期劳累过度容易导致内伤。

   cháng​qī láo​lèi guò​dù róng​yì dǎo​zhì nèi​shāng.

   Long-term overwork can easily lead to internal injuries.

   Source: Dong Chinese Dictionary

2. 他为了供孩子上学，长年辛苦劳累。

   tā wèi​le gōng hái​zi shàng​xué, cháng​nián xīn​kǔ láo​lèi.

   He worked hard for years to put his children through school.

   Source: Dong Chinese Dictionary