The troops were entrenched near the mountains.
部队在群山边筑起壕沟以
自己。
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纪实
琳 生命中的一年》 She worked out that, if the left hemisphere was staying alert to keep guard in a strange environment, then it would react to the irregular beeps by stirring people from sleep and would ignore the regularly timed ones.
她发现,如果
脑左半球在一个陌生的环境中
了防卫而保持警觉,它就会对不规律的哔哔声做出反应,从而把人从睡梦中唤醒,而忽略定时响起且声调不变的哔哔声。