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1. The temperature gauge read 68 degrees Fahrenheit, which is 30 degrees above the normalmercury level.
温度计显示摄氏68度，比正常水平高30度。
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2. The thermometer was set to the correct mercury level for the room's temperature.
温度计被设定为房间的正确汞水平。
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3.The barometer reading indicated that the air pressure was slightly above normal, indicating a slight rise in atmospheric mercury levels.
气压读数表明大气压力略高于正常值，表明大气汞水平略有上升。