2 sentences

1. 我忘了带钥匙。

   wǒ wàng le dài yuè shi.

   I forgot to bring my keys.

   Source: Dong Chinese Dictionary

2. 找到解决这个问题的锁钥是当前最紧要的事。

   zhǎo​dào jiě​jué zhè gè wèn​tí de suǒ yuè shì dāng​qián zuì jǐn​yào de shì.

   Finding the key to solving this problem is the most urgent matter at present.

   Source: Dong Chinese Dictionary