1. rub rosin onto, as of violin bows. 
   用松香涂在小提琴的弦弓上。
2. When an element is caused to combine with oxygen it is oxidized. 
   某种元素同氧气化合就叫做氧化。
3. a bag filled with rosin; used by baseball pitchers to improve their grip on the ball. 
   装树脂的包；帮助棒球手握紧球。
4. The rosin and tannin that can be extracted from it are sought by the chemical industry. 
   从中提取的松香和鞣酸化学工业上是很需要的。
5. combined with or having undergone a chemical reaction with oxygen: the oxidized form of iodine. 
   与氧化合的，或经历氧化反应的：碘的氧化形式。

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• 1. 氧化松香
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