Black tea can help you concentrate. A study at the University of Northumbria found that caffeine and L-theanine in black tea leaves improves cognitive skills.
饮用红茶可以帮助您的注意力得到集中，因为红茶里面的咖啡因以及茶氨酸可以改善大脑的认知功能。
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。
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。
This chemical is an amino acid called L-theanine.
这种化学物质是一种叫做L -茶氨酸的氨基酸。
This chemical is an amino acid called L-theanine.
这种化学物质是一种叫做L -茶氨酸的氨基酸。
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