普通人的许多活动、想法及其它有用的资料，从来没有记录。
Many activities and thoughts of ordinary people, plus other useful data, were never recorded.
她花了许多年时间观察和记录他们的日常活动。
She spent many year observing and recording their daily activities.
她花了许多年时间观察和记录他们的日常活动。
She spent many year observing and recording their daily activities.
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