An alert mind can also concentrate well.
灵活的头脑也会助于集中精力。
The watchful mind, being alert, sensitive, knows when the organism needs rest and care.
警觉的心灵，保持机警，敏感，知道这个有机体需要休息和照顾。
Although he's over eighty his mind is still remarkably alert.
他虽已年过八十，但头脑仍然十分机敏。
A new study involving fruit flies suggests the sleep-deprived mind is kept alert by hunger.
对果蝇的最新研讨标明，饥饿能让短少睡眠的头脑坚持清醒。
How can there be a very alert, sensitive, clear mind if the organism itself is dull and heavy?
如果身体都变得迟钝沉重，怎能有一颗非常机警、敏感、清晰的心呢？
Then the mind is no longer quick, pliable, alert.
那样心就不再敏捷、柔软和机警。
They keep your muscles energised and your mind alert.
能即时为肌肉提供能量并保持思维敏捷。
Although he's over eighty his mind is still remarkably alert.
他虽已年逾八十，但头脑仍十分机敏。
Although he's over eighty his mind is still remarkably alert.
他虽已年逾八十，但头脑仍十分机敏。
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