4 sentences

1. 此时此刻，我感到殊为不易。

   cǐ​shí​cǐ​kè, wǒ gǎn​dào shū wéi bù​yì.

   At this moment, I feel it has been remarkably difficult.

   Source: Dong Chinese Dictionary

2. 他在利益面前能做到克己守法，实属不易。

   tā zài lì​yì miàn​qián néng zuò​dào kè​jǐ​shǒu​fǎ, shí​shǔ bù​yì.

   It is not easy for him to practice self-restraint and remain law-abiding when faced with personal gain.

   Source: Dong Chinese Dictionary

3. 想要在短时间内学会一门外语实属不易。

   xiǎng​yào zài duǎn shí​jiān nèi xué​huì yī mén wài​yǔ shí​shǔ bù​yì.

   It is no easy task to learn a foreign language in a short period of time.

   Source: Dong Chinese Dictionary

4. 在这个多变的时代，很少有永恒不易的法则。

   zài zhè​ge duō​biàn de shí​dài, hěn shǎo yǒu yǒng​héng bù​yì de fǎ​zé.

   In this ever-changing era, few rules remain forever unchanged.

   Source: Dong Chinese Dictionary