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来源:雅诚德英语网
In general, each of us needs about 8 hours of sleep each day to keep us healthy and happy.
一般来说,我们每个人每天需要大约8个小时的睡眠来保持健康和愉悦的心情。
In general, each of us needs about 8 hours of sleep each day to keep us healthy and happy.
一般来说,我们每个人每天需要大约8个小时的睡眠来保持健康和愉悦的心情。