ppm
导读：ppm读音音标
英 [\'pi:p\'i:\'em]美 [\'pip\'i\'em]
ppm意思解释
abbr.part per million 百万分之…； 英英释义 PPMPPM is an initialism that can refer to any of the foll
英 [\'pi:p\'i:\'em]美 [\'pip\'i\'em]
ppm意思解释
abbr.part per million 百万分之…； 英英释义 PPMPPM is an initialism that can refer to any of the foll
ppm读音音标
英 [\'pi:p\'i:\'em]
美 [\'pip\'i\'em]
ppm意思解释
abbr.
part per million 百万分之…；
英英释义
PPMPPM is an initialism that can refer to any of the following in this list:
