8 sentences

1. 他在初三学习非常刻苦。

   tā zài chū​sān xué​xí fēi​cháng kè​kǔ.

   He studied very hard in the third year of junior high school.

   Source: Dong Chinese Dictionary

2. 他学习刻苦，成绩一直名列前茅。

   tā xué​xí kè​kǔ, chéng​jì yī​zhí míng​liè​qián​máo.

   He studies hard and his grades are always among the best.

   Source: Dong Chinese Dictionary

3. 自朝至暮，他都在书房里刻苦攻读。

   zì zhāo zhì mù, tā dōu zài shū​fáng lǐ kè​kǔ gōng​dú.

   From morning until night, he studied diligently in his study room.

   Source: Dong Chinese Dictionary

4. 这种刻苦学习的精神值得我们效法。

   zhè zhǒng kè​kǔ xué​xí de jīng​shén zhí​de wǒ​men xiào fǎ.

   This spirit of hard study is worth emulating.

   Source: Dong Chinese Dictionary

5. 想要取得成功，必先经历一番刻苦努力。

   xiǎng​yào qǔ​dé chéng​gōng, bì xiān jīng​lì yī fān kè​kǔ nǔ​lì.

   To achieve success, one must first go through a period of hard work.

   Source: Dong Chinese Dictionary

6. 他每天刻苦练习，以求能在比赛中夺冠。

   tā měi tiān kè​kǔ liàn​xí, yǐ​qiú néng zài bǐ​sài zhōng duó​guàn.

   He practices hard every day in order to win the championship in the competition.

   Source: Dong Chinese Dictionary

7. 经过多年的刻苦训练，他终于如愿以偿地拿到了金牌。

   jīng​guò duō nián de kè​kǔ xùn​liàn, tā zhōng​yú rú​yuàn​yǐ​cháng de ná​dào le jīn​pái.

   After years of hard training, he finally achieved his goal and won the gold medal.

   Source: Dong Chinese Dictionary

8. 为了提高部队的战斗力，士兵们每天在操场上刻苦练兵。

   wèi​le tí​gāo bù​duì de zhàn​dòu​lì, shì​bīng men měi tiān zài cāo​chǎng shàng kè​kǔ liàn​bīng.

   To improve the combat effectiveness of the troops, the soldiers train hard on the drill ground every day.

   Source: Dong Chinese Dictionary