during  
preposition uk/ˈdʒʊə.rɪŋ/ us/ˈdʊr.ɪŋ/
  (THROUGH)      
 A2 在…期间
from the beginning to the end of a particular period
  They work during the night and sleep by day. 他们夜里干活儿,白天睡觉。 
 There were huge advances in aviation technology during the Second World War. 在第二次世界大战期间航空技术有了长足的发展。 
 Compare: while conjunction (DURING)
 - More examples
 - The (traffic) congestion in the city gets even worse during the summer.
 - The work that the students do during the year will count towards their final degrees.
 - The city centre's quite quite lively during the day, but it's totally dead at night.
 - You're not allowed to talk during the exam.
 - Jean was my roommate during our first year at university.
 
  (AT SOME TIME IN)      
A2 在…期间的某个时候
at some time between the beginning and the end of a period
  I woke up several times during the night. 夜里我醒了好几次。 
 - More examples
 - Many buildings were badly damaged during the war.
 - A new manager was appointed during her absence.
 - Rain will become more general in the southeast during the afternoon.
 - The baby generally wakes up three times during the night.
 - The girl went missing during a family outing to Mount Snowdon.