soporifically       
adverb uk/ˌsɒp.ərˈɪf.ɪ.kəl.i/ us/ˌsɑː.pəˈrɪf.ɪ.kəl.i/
 催眠地,使人昏昏欲睡地
in a way that causes sleep or makes a person want to sleep
  My days usually consist of frequent and soporifically long meetings.  我的日常活动通常包括频繁的、令人昏昏入睡的长时间会议。 
 She sat gazing soporifically into the glowing embers of a log fire. 她坐在那里,昏昏欲睡地凝视着炉火的余烬。 
 See: soporific
 - More examples
 - The arguments are so soporifically dull that no one will ever stay interested in them.
 - We drove at soporifically slow speed along roads that were tarmacked and smooth.
 - The whole thing was extraordinarily, soporifically peaceful.