Babies sleep for up to eighteen hours a day.People have no idea how important sleep is to their lives.

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Babies sleep for up to eighteen hours a day.People have no idea how important sleep is to their lives.

Babies sleep for up to eighteen hours a day.People have no idea how important sleep is to their lives.
Babies sleep for up to eighteen hours a day.
People have no idea how important sleep is to their lives.

Babies sleep for up to eighteen hours a day.People have no idea how important sleep is to their lives.
1)婴儿每天都要睡18个小时
2)人们不知道对婴儿们来说睡觉到底有多重要