日程活动的添加与删除需在日历页面进行操作。
Schedule activities to add or delete should be operated in the calendar page.
管理部分包括管理首页、书籍和书目的添加与删除、订单管理、用户资料管理。
Managers' part includes manager's homepage, addition and deletion pages of book, order management, customers' data management.
他们还可以使用左侧的工具栏轻松地添加和删除朋友，或者与他们聊天。
They can also easily add and remove friends, or chat with them, on the left-side rail.
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