2 sentences for 擅 (shàn)

1. 他不仅博学多才，而且极擅辞令，非常有口才。

   tā bù​jǐn bó​xué​duō​cái, ér​qiě jí shàn cí​lìng, fēi​cháng yǒu kǒu​cái.

   He is not only knowledgeable but also very eloquent.

   Source: Dong Chinese Dictionary

2. 未经相关部门批准，任何人都不得擅改合同内容。

   wèi jīng xiāng​guān bù​mén pī​zhǔn, rèn​hé rén dōu bù dé shàn gǎi hé​tong nèi​róng.

   No one is allowed to alter the contract without authorization from the relevant departments.

   Source: Dong Chinese Dictionary