类似地，如果输入两个逗号作为用户数据，那么列表中该位置的通道出口将获取由空白字符串组成的用户数据。
Similarly, if a double comma is entered as user data, then the channel exit at that position in the list will get user data consisting of a blank String.
该时间戳列默认情况下由数据库管理器维护，但是也接受用户提供的输入值。
This timestamp column is maintained by default by the database manager, but a user-provided input value is also accepted.
它由包括虚拟身体在内的虚拟环境数据库、输入驱动、用户对象交互管理器、环境更新和输出驱动几个部分组成。
The model is composed of the VE database and six other components: input driver, output driver, user object, virtual body, interaction manager, and environment update.
是否可以作为有效数据由用户输入。
是否可以作为有效数据由用户输入。
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