What's more, it is specified whether the product configuration unit is based on plug-in or feature.

而且，还要在这里指定产品配置单元是基于插件还是基于功能的。

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The JUnit unit test plug-in.

JUnit单元测试插件。

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But the car will not burn gasoline to recharge the battery until the plug-in unit is exhausted.

但是这种汽车只有在充电设施耗尽后才会通过燃烧汽油为电池充电。

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