3 sentences

1. 一只死海狮是难得的机会。

   yī zhī sǐ hǎi​shī shì nán​dé de jī​huì.

   A dead sea lion is a rare opportunity.

   Source: OpenSubtitles

2. 享受这个难得的机会，在一个屋檐下看到7位大师的作品！

   xiǎng​shòu zhè​ge nán​dé de jī​huì, zài yī​ge wū​yán xià kàn dào7 wèi dà​shī de zuò​pǐn!

   Enjoy this rare opportunity to see the works of 7 masters under one roof!

   Source: CCMatrix

3. 纯粹由于偶然的机会，他在一家小旧书店里找到了他所需要的那本难得的书。

   chún​cuì yóu​yú ǒu​rán de jī​huì, tā zài yī​jiā xiǎo jiù shū​diàn li zhǎo dào le tā suǒ xū​yào de nà běn nán​dé de shū.

   By pure chance he found the rare book he needed in a little second-hand bookshop.

   Source: UM-Corpus: Spoken