improver是什么意思？

improver

英[ɪm'pru:və] 美[ɪm'pruvə]

• n. 改进者，提高的人，改良物；

例句

• Aim To synthesize new type of octane number improver for gasoline, methoxyisobutyrate. 目的合成一种新型汽油辛烷值改进剂─甲氧基异丁酸烷基酯.
• Cyclohexyl nitrate is an effective cetane number improver for diesel oil. 硝酸环己酯是一种有效的柴油十六烷值改进剂.
• Cetane improver . Makes the engine run better at higher compression settings. 碳氢化合物的改进物. 使引擎在高压缩比时运转较为顺畅.

英英词典释义

• Noun
  1. someone devoted to the promotion of human welfare and to social reforms
  2. a component that is added to something to improve it;
  "the addition of a bathroom was a major improvement""the addition of cinammon improved the flavor"