ring open-hearth的用法和樣例：
例句
- Each relay driver is an open - collector transistor with a suppression diode.
每一個中繼驅動器是一個集電極開環的三極體和一個穩壓二極體。 - Ring opening of copolymerization and homopolymerization between acrylpimaric acid and ethylene oxide at different mole ratio were studied.
研究了丙烯海松酸與不同摩爾數的環氧乙烷所進行的開環均聚和共聚反應。
