Chicken and complex carbohydrates increase the level of serotonin in the brain.

鸡肉和碳水化合物增加了大脑的5 -羟色胺水平。

youdao

One of the reasons I am writing this article is to increase the level of understanding.

我写这篇文章的一个目的就是提高人们的理解水平。

youdao

Music has also been shown to increase the level of neurotransmitters such as serotonin, which are linked to mood.

音乐还显示了增加神经递质如五羟色胺的水平，这种物质跟情绪有关。

youdao

Mr.Stevens says a one hundred percent increase in fish farming over ten years is necessary to keep providing for people at the current level.

VOA: special.2011.02.08

For any given level of return, you can reduce the risk; for any given level of risk, you can increase the return; sounds pretty good.

给定回报率,可以降低风险,给定风险水平,可以提高回报率,听上去不错

耶鲁公开课 - 金融市场课程节选

The increase to level 5 indicates that there is sustained human-to-human transmission in communities in different geographical locations.

VOA: standard.2009.04.29

"Each year we've had to steadily increase the level of security, " he said.

CNN: Police search for gang members in shooting

Putting your PowerPizza in a carrier bag will not only increase the level of disguise - it'll keep it dry too.

ENGADGET: Disguise your PowerBook as a PowerPizza

Will a vaccine adjuvant or vaccine vector increase the level of protection?

WHITEHOUSE: Office of National AIDS Policy Blog