ortho ester

例句：

1. 1.The ortho esters are used in the production of plastics.
   正酯用于塑料的生产。
2. 2. The ortho esters have a higher melting point than their isomers.
   正酯的熔点比其异构体高。
3. 3. The ortho esters are more stable than their isomers.
   正酯比其异构体更稳定。