This returns the number of columns in the row metadata instance ,返回行元數據實例中的列的數目。
Affected vehicles will continue to be temporarily diverted via kweilin street northbound , un chau street westbound and yen chow street southbound onto fuk wing street 受影響的車輛須繼續改經桂林街北行元州街西行及欽州街南行至福榮街。