3 sentences

1. 秤不准，短了半斤。

   chèng bù zhǔn, duǎn le bàn jīn.

   The scale is inaccurate; it's short by half a jin.

   Source: Dong Chinese Dictionary

2. 他用秤称了一下这袋大米的重量。

   tā yòng chèng chēng le yī​xià zhè dài dà​mǐ de zhòng​liàng.

   He weighed the bag of rice using a scale.

   Source: Dong Chinese Dictionary

3. 请秤一下这块猪肉，看看到底有多重。

   qǐng chēng yī​xià zhè kuài zhū​ròu, kàn kàn dào​dǐ yǒu duō zhòng.

   Please weigh this piece of pork to see exactly how much it weighs.

   Source: Dong Chinese Dictionary