2 sentences

1. 请代为转达我的谢意。

   qǐng dài​wéi zhuǎn​dá wǒ de xiè​yì.

   Please convey my thanks on my behalf.

   Source: Dong Chinese Dictionary

2. 由于正职请假，他目前暂时代为署理馆务。

   yóu​yú zhèng​zhí qǐng​jià, tā mù​qián zàn​shí dài​wéi shǔ lǐ guǎn​wù.

   Because the head is on leave, he is currently acting in charge of the library affairs.

   Source: Dong Chinese Dictionary