1. rub rosin onto, as of violin bows. 
   用松香涂在小提琴的弦弓上。
2. 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。
3. 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。
4. My fingers caressed its golden wood. I tuned the strings, miraculously still intact, tightened the bow, and put rosin on the dry horse-hairs. 
   我的手指轻轻地抚摸着金色的琴木，令人惊喜的是，琴弦仍然完好无损。我调试了一下琴弦，紧了紧琴弓，又往干巴巴的马尾弓上抹了点松香。
5. free expansion; free oxygen; a free electron. 
   自由膨胀；游离氧；自由电子。

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• 1. 游离松香
  free on board 离岸价格...free rosin 游离松香...free rosin size 游离松香胶
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