5 sentences

1. 他正吃力地爬上那个小土陀。

   tā zhèng chī​lì de pá​shàng nà​gè xiǎo tǔ tuó.

   He is struggling to climb up that small mound.

   Source: Dong Chinese Dictionary

2. 她提着厚重的行李箱，吃力地上了火车。

   tā tí zhe hòu​zhòng de xíng​li​xiāng, chī​lì de shàng le huǒ​chē.

   Carrying a heavy suitcase, she struggled to get on the train.

   Source: Dong Chinese Dictionary

3. 他背着一个沉重的包袱，看起来走得很吃力。

   tā bēi zhe yī gè chén​zhòng de bāo​fu, kàn​qǐ​lai zǒu de hěn chī​lì.

   He was carrying a heavy bundle and looked like he was walking with great effort.

   Source: Dong Chinese Dictionary

4. 搬运这些沉重的家具是一项非常吃力的工作。

   bān​yùn zhè​xiē chén​zhòng de jiā​jù shì yī xiàng fēi​cháng chī​lì de gōng​zuò.

   Moving this heavy furniture is very strenuous work.

   Source: Dong Chinese Dictionary

5. 这把利斧重达五斤，普通人挥动起来非常吃力。

   zhè bǎ lì fǔ zhòng dá wǔ jīn, pǔ​tōng​rén huī​dòng qi​lai fēi​cháng chī​lì.

   This sharp axe weighs five catties, making it very strenuous for an average person to swing.

   Source: Dong Chinese Dictionary