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Infants, on the other hand, didn't appear to have worse sleep whether they slept in the same or different room from their mothers.
2016年6月六级真题（第一套）听力 Section B
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Mothers who slept in the same room as their infants, whether in the same bed or just the same room, had poorer sleep than mothers whose babies slept elsewhere in the house: They woke up more frequently, were awake approximately 20 minutes longer per night
2016年6月六级真题（第一套）听力 Section B
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Other studies have found that even infants in East Asia sleep about an hour less than European infants, so we're trying to figure out how culture shapes the way you sleep.
2019年6月六级真题（第二套）听力 Section C
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You probably remember that human infants are less developed physically than other mammals of the same age.
2019年12月六级真题（第一套）听力 Section C