英语语法分析

Instead, buy a brand called Suntheanine, which is pure L-theanine.

因此，（可以）买Suntheanine牌子的茶饮，它是纯L-茶氨酸制成的。

However, green tea doesn't contain enough L-theanine to significantly boost your REM cycles.

然而，绿茶里没有足够的L -茶氨酸来提升你的睡眠周期。

This study has a better instruction and utilizing value for produceing theanine of microbe ferment.

本实验对于微生物发酵法工业化生产茶氨酸等方面的工作具有较好的指导作用和实际价值。