active ingredient [ˈæktɪv ɪnˈɡridiənt]

例句:

• The active ingredient in some of the mouthwashes was simply detergent.
  某些漱口剂中的有效成分只不过是洗涤剂而已。
  来自柯林斯例句
• Byetta and Bydureon share an active ingredient, exenatide.
  来自WSJ
• Commonly prescribed are anti - microbial mouthwashes containing the active ingredient chlorhexidine gluconate.
  抗菌抗菌漱口水都包含有效成分--太葡糖酸盐.
  
• The kit can detect THC, the active ingredient in cannabis.
  来自THETIMES
• Acetaminophen is the active ingredient in painkillers such as Tylenol.
  在止痛药如泰诺林对乙酰氨基酚是其活性成分.
  
• Once an active ingredient is approved it doesn't matter how others formulate it.
  来自SA