3 sentences

1. 在这个庄重的时刻，我们共同缅怀先烈。

   zài zhè​ge zhuāng​zhòng de shí​kè, wǒ​men gòng​tóng miǎn​huái xiān​liè.

   At this solemn moment, we together commemorate the martyrs.

   Source: Dong Chinese Dictionary

2. 人们聚在一起，深情缅怀这位伟大的科学家。

   rén​men jù zài yī​qǐ, shēn​qíng miǎn​huái zhè wèi wěi​dà de kē​xué​jiā.

   People gathered to affectionately remember the great scientist.

   Source: Dong Chinese Dictionary

3. 老同学聚会时，大家一起缅怀那段无忧无虑的校园时光。

   lǎo tóng​xué jù​huì shí, dà​jiā yī​qǐ miǎn​huái nà duàn wú​yōu​wú​lǜ de xiào​yuán shí​guāng.

   At the reunion, old classmates reminisced about their carefree school days.

   Source: Dong Chinese Dictionary