In our sample database, there are four tables.
我们的样例数据库中有4个表。
The sample cube is lit with all four types of light.
分别以4 种类型的光照射示例立方体。
In the sample output, there are four portlets configured in normal mode.
在示例输出中，有四个以正常模式配置的Portlet。
Four sample activities are also offered in the paper.
此外，还设计了四个课堂活动示例。
Four sample activities are also offered in the paper.
此外，还设计了四个课堂活动示例。
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