2 sentences for 限定 (xiàn​dìng)

1. 每位顾客限定购买两件商品。

   měi wèi gù​kè xiàn​dìng gòu​mǎi liǎng jiàn shāng​pǐn.

   Each customer is limited to purchasing two items.

   Source: Dong Chinese Dictionary

2. 讨论的范围被限定在教育问题上。

   tǎo​lùn de fàn​wéi bèi xiàn​dìng zài jiào​yù wèn​tí shàng.

   The scope of the discussion was limited to educational issues.

   Source: Dong Chinese Dictionary