rosin

• 指从松树等植物中提取的固体或半固体树脂，尤其指松香；也指由简单分子聚合而成的类似树脂状物质。

A noun referring to a solid or semisolid viscous substance obtained as an exudation from certain plants or prepared by polymerization of simple molecules.

不可数

1. Solid plant resinB2formal

   A solid or semi-solid substance obtained from certain plants, often used in varnishes, adhesives, and for treating the bows of string instruments.

   松香

   • The violinist applied rosin to the bow to improve friction.
   • Rosin is commonly used in the production of some varnishes.
   • The sticky rosin from the pine tree was collected for industrial use.

   同义词colophony

• 动词，指把松香（一种树脂物质）涂在弦乐器的弓毛上或需要增大摩擦力的表面上。

A verb meaning to apply rosin (a resin substance) to the bow of a stringed instrument or to a surface to increase friction.

1. C1formal

   To rub or apply rosin, a resin substance, onto a surface, typically the bow of a stringed instrument or the hands of a performer, to increase friction or grip.

   擦松香

   • The violinist rosined her bow before the concert.
   • He carefully rosined the horsehair to improve the sound.
   • The gymnast rosined her hands to prevent slipping on the apparatus.