正如前面所提到的，无提示保存不会引发任何事件。
As we mentioned earlier, a quiet save doesn't fire up any events.
正如前面所提到的，创建数据库连接的开销非常大。
As mentioned earlier, database connections are expensive to create.
正如前面所提到的，预生产还可能用于用户接受测试。
As mentioned earlier, pre-production might also be used for User Acceptance Testing.
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