保证八个小时的睡眠 Guaranteed eight hours of sleep ; Ensure that the eight-hour sleep
每晚睡八个小时 Sleeping eight hours every night
八个小印第安人 eight little Indians
每晚八个小时 Eight hours every night
每天睡八个小时 Sleep eight hours a day
一窝产八个小猪 a litter of eight pigs
睡眠八个小时每夜 sleep eight hours a night
他每天晚上睡八个小时 Eight hour's sleep each night
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