创业的过程很艰苦。

Chuàngyè de guòchéng hěn jiānkǔ.

Starting a business is a tough process.

世界上有很多人过着艰苦的生活。

Shìjiè shàng yǒu hěn duō rén guòzhe jiānkǔ de shēnghuó.

Many people in the world live hard lives.

艰苦的训练使他们更加坚强。

Jiānkǔ de xùnliàn shǐ tāmen gèngjiā jiānqiáng.

The arduous training made them stronger.