passing  
 noun uk/ˈpɑː.sɪŋ/ us/ˈpæs.ɪŋ/
  (CONVERSATION)     
 in passing 顺便,附带地
If something is said in passing, it is said while talking about something else and is not the main subject of a conversation.
  When asked if he had told the police about the incident, Mr Banks said he had mentioned it in passing to a detective. 被问及是否已将此告诉了警察时,班克斯先生说他曾向一位侦探顺便提过。 
   (TIME)        
the passing of time/the years (时间的)流逝,过去
the process of time passing
  My parents seem to have mellowed with the passing of the years. 随着岁月的流逝,我父母似乎变得心气平和了。 
  [ S ]逝世,去世;流逝,消失 
the death or end of someone or something
  Ten years after her death, the public still mourns her passing. 她死去10年后,人们仍在为她的去世感到悲痛。 
 the passing of the old year 旧的一年的流逝 
 passing  
adjective [ before noun ] uk/ˈpɑː.sɪŋ/ us/ˈpæs.ɪŋ/
  (GOING PAST)      
  路过的,经过的
moving past
  A passing motorist stopped and gave her a lift to the nearby town. 一名路过的汽车司机停下来,把她捎到了附近的镇上。 
   (TIME)         
 短暂的,一时的
lasting only for a short time and not important or complete
  I gave the restaurant a passing glance as I walked by, but I didn't notice who was in there. 走过这家餐馆时我瞟了一眼,但没有注意到谁在里面。 
 The matter is only of passing scientific interest. 这东西的科学意义只是暂时的。 
  过去的,逝去的
used to refer to a period of time that is going past
  The situation seems to become more hopeless with each/every passing day. 日子一天天过去了,局势似乎越来越无可救药了。 
 Idiom   
a passing resemblanceidiom  些许的相似
a slightly similar appearance
  He bears more than a passing resemblance to (= he is noticeably similar to) the young Marlon Brando. 他长得颇像年轻时的马龙‧白兰度。