英语语法分析

With another, valine, the excess was 23% and with alanine, 20%.

另一种缬氨酸超出了23%，丙氨酸则是20%。

Valine: One of the essential amino acids, found in most proteins.

缬氨酸：一种氨基酸，大部分在蛋白质中发现。

First, the separation of L-Valine on a single chromatographic column was investigated.

本文首先研究了缬氨酸在单根色谱柱上的分离情况。