2 sentences

1. 实际情况与我们的预期稍有偏差。

   shí​jì qíng​kuàng yǔ wǒ​men de yù​qī shāo yǒu piān​chā.

   The actual situation is slightly different from our expectations.

   Source: Dong Chinese Dictionary

2. 采样方法不当会导致实验结果产生偏差。

   cǎi​yàng fāng​fǎ bù​dàng huì dǎo​zhì shí​yàn jié​guǒ chǎn​shēng piān​chā.

   Improper sampling methods can lead to deviations in experimental results.

   Source: Dong Chinese Dictionary