High levels of GABA can prevent neurons forming new connections - and slow down the brain's ability to learn - while low levels free nerve cells to create new brain circuitry.

GABA含量高时，神经元无法形成新的连结，同时大脑的学习能力也会降低；而含量低时，神经细胞可自由形成新的连结。

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To keep your stress levels in check, learn helpful stress management techniques or seek the advice of a counselor or doctor.

请将压力水平限制在自己能掌控的范围内，并学会一些能缓解压力的方法或者向你的咨询师或医生征询意见。

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After we catch up with the world's advanced levels in science and technology, we shall still have to learn from the strong points of others.

即使我们的科学技术赶上了世界先进水平，也要学习人家的长处。

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As for those who're picking this up to learn guitar, the ramping difficulty levels in Pro mode are very smartly executed.

ENGADGET: Rock Band 3 Pro guitar preview: the guitarist vs. the guitar hero

In the United States, however, education is managed at the state and local levels, and expectations about what students should learn and how well they should learn it vary widely across the country.

UNESCO: II Part Analytic Section

GLaDOS taunts you, Wheatley cracks jokes and as you play, you slowly learn about the history of Aperture as you descend into its levels.

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