midst         
 noun [ U ]  formal uk/mɪdst/ /mɪtst/ us/mɪdst/ /mɪtst/
 中间,当中,中央
the middle of a group of people or things
  She caught sight of Johnny in their midst (= among them), laughing and talking. 她看到约翰尼在他们当中,又说又笑。 
 in the midst of something 正当…的时候;在…之中
in the middle of an event, situation, or activity
  I'm sorry but I'm too busy - I'm in the midst of writing a report. 恐怕我太忙了——我正在写一份报告。 
 The country is in the midst of an economic crisis. 这个国家正在经历一场经济危机。 
 midst       
preposition  literary uk/mɪdst/ /mɪtst/ us/mɪdst/ /mɪtst/
 在…中;为…所环绕
among
  The summit of the mountain appeared midst the clouds. 山顶在云中显现。