名詞 conditioner:

1. exercise that conditions the body
2. a trainer of athletes
3. a substance used in washing (clothing or hair) to make things softer

1. Hair's natural shine is supplied by its own conditioner, sebum, an oil composed of waxes and fats and also containing a natural antiseptic that helps fight infection. Too much sebum results in greasy hair and conversely, too little sebum makes dry hair.
   頭發(fā)的自然光澤來自它自身的護發(fā)素：油脂，它含有蠟和脂肪，還含有抗感染的自然抗菌劑。油脂含量過多會導致油性發(fā)質，相反，油脂含量過少則會導致干性發(fā)質。
2. Only the whir of the air conditioner broke the silence in the office.
   打破辦公室內寂靜的，只有空氣調節(jié)機呼呼的轉動聲。
3. Lipstick and hair conditioner are cosmetics.
   口紅和護發(fā)素都是化妝品。
4. This new style of air conditioner is noiseless.
   這種新型空調沒有噪音。

con.di.tion.er

n.（名詞）
One that conditions, especially an additive or application that improves the quality or usability of a substance:
調節(jié)物，尤指能改進物質的性質或使用性的添加劑或裝置：
例句：
a soil conditioner; a hair conditioner.
土壤團粒結構促進劑，吹風機