深海热泉是地球表面出现的裂缝，我们在这里提到的裂缝是在海底深处发现的。
Hydrothermal vents are cracks in the Earth's surface that occur, the ones we are talking about here are found deep at the bottom of the ocean.
1939年以前建造的房屋每平方英尺消耗的能源比2000年以后建造的房屋多50%，这主要是由于微小的裂缝随着时间的推移而扩大，更多的外部空气进入了裂缝。
Houses built before 1939 use about 50% more energy per square foot than those built after 2000, mainly due to the tiny cracks and gaps that expand over time and let in more outside air.
1991年采取了对裂缝水泥灌浆和对裂缝区域混凝土增加预应力的方法进行修复。
Repairs were made in 1991 by grouting the cracks and installing prestressed anchors in the cracked areas.
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