3 sentences

1. 此乃冯大之业，不可轻视。

   cǐ nǎi píng dà zhī yè, bù kě qīng​shì.

   This is a grand undertaking and must not be underestimated.

   Source: Dong Chinese Dictionary

2. 人各有所长，我们不应该随便轻视他人。

   rén gè​yǒu​suǒ​cháng, wǒ​men bù yīng​gāi suí​biàn qīng​shì tā​rén.

   Everyone has their own strengths; we shouldn't look down on others lightly.

   Source: Dong Chinese Dictionary

3. 我们不能因为一个人的背景就轻视他。

   wǒ​men bù néng yīn​wèi yī gè rén de bèi​jǐng jiù qīng​shì tā.

   We shouldn't look down on someone just because of their background.

   Source: Dong Chinese Dictionary