2 sentences for 镜 (jìng — lens)

1. 显微镜可以观察微小的细胞。

   xiǎn wēi jìng kě​yǐ guān​chá wēi​xiǎo de xì​bāo.

   Microscopes can observe tiny cells.

   Source: Dong Chinese Dictionary

2. 他用放大镜观察树叶的纹理。

   tā yòng fàng​dà jìng guān​chá shù​yè de wén​lǐ.

   He used a magnifying glass to observe the texture of the leaves.

   Source: Dong Chinese Dictionary