潜流和表流区除磷效果不明显，可能是因为湿地运行了两年多，土壤吸附交换达到平衡，影响了表流区的除磷效果。
The removal effect of phosphorus in SSF and FWS units is not noticeable, probably due to the saturation of soil adsorption after more than two years operating for the FWS unit.
当消息流仅从表读取数据时，请考虑使用表的只读视图。
Where a message flow only reads data from a table, consider using a read only view of that table.
重复步骤 6-8，把填充 DWADMIN.HOLDINGS 表的数据流添加到控制流中。
Repeat Steps 6-8 above to add the data flow that populates the DWADMIN.HOLDINGS table to this control flow.
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