free rosin

例句：

1. 1. The artist uses free rosin to create his masterpieces.
   这位艺术家使用自由松香创作他的作品。
2. 2. The craftsman used free rosin to polish the wooden table.
   工匠使用自由松香来打磨木桌。
3. 3. The painter applied free rosin to the canvas to enhance its texture.
   画家在画布上涂抹自由松香以增加其质感。