我开始看到一群母亲和一位父亲一边推着婴儿车一边打电话。
I began to see a veritable army of mothers and one father pushing a stroller while talking on the cell phone.
婴儿有一大群母亲。
如此说来，青少年是睡眠质量最糟糕的一群人，婴儿潮的人群能得到最好的睡眠质量。
And it's the teenagers who are the sleepiest of all, with baby boomers getting the most sleep.
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