看到这美丽的风景，我不禁感慨万分。

Kàn dào zhè měilì de fēngjǐng, wǒ bù jīn gǎnkǎi wànfēn.

Seeing this beautiful scenery, I couldn't help but feel deeply moved.

看到孩子们努力学习，令人感慨不已。

Kàn dào háizimen nǔlì xuéxí, lìngrén gǎnkǎi bùyǐ.

Seeing children study hard is truly moving.

长时间的离别让人产生了很多感慨。

Cháng shíjiān de líbié ràng rén chǎnshēngle hěnduō gǎnkǎi.

Long periods of separation bring about a lot of sentiments.