可可电台，每期节目一话题，让英语磨练耳朵的同时学到更多有益的小知识，丰富知识的同时受益于生活。

摆脱特困户

Don't sleep more, exercise more

别老躺着，多起来hi一下。

Eight hours of sleep is usually enough for adults. Getting longer sleep may reduce activity in the cerebral cortex,making people sleepier.

Instead, slightly increase the level of your physical activity, which will help to send more oxygen to the brain, making us feel awake and energetic.

Aerobic exercise, such as jogging, swimming and rope skipping, are recommended.

【知识点津】

cortex n.皮质；树皮；果皮

例句：

Within the epidermis develops a ring of parenchyma cells, the cortex.

在表皮细胞内有一个质壁细胞环, 即皮层.

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