可以翻译为:Under normal circumstances,shipment is expected to arrive tomorrow,but because Beijing is currently affected by the fog,the flight may be about 1 day delay
Shipment is expected to arrive tomorrow under normal circumstances while the flight may be delayed for about 1 day due to the current thick fog in Beijing.
Under normal circumstances, shipment is expected to arrive tomorrow, but because Beijing is currently affected by the fog, the flight may be about 1 day delay