英语语法分析

Ellagitannin, the main tannin in oak, is an important factor influencing the quality of grape wine in oak barrel.

鞣花单宁是橡木中的主要单宁，是影响橡木桶贮葡萄酒质量的重要因素之一。

Ellagitannin mainly influences the following aspects of grape wine: sensory characteristics, the quality, distilling wine taste, and polyphenol content change.

鞣花单宁可引起葡萄酒的感官特性、质量、蒸馏酒风味和葡萄酒中多酚含量的变化。