室内外空气的交换速度，这取决于房屋的构造、居住者的通风习惯和窗户的密封程度。
The rate of exchange between indoor and outdoor air, which depends on the construction of the house, the ventilation habits of the inhabitants, and the sealing of Windows.
我们购买空调时，需要根据房屋的具体情况（房间类型、大小、楼层高低、密封程度。
We buy air conditioning, need according to the specific situation of the house (room type, size, floor height, sealing length etc.
如果温度高到一定程度，堆心就会落到反应堆容器的底部并将其熔穿，从而到达密封装置的底部。
If the temperature is high enough, the core slumps to the bottom of the reactor vessel and melts through it and onto the floor of the containment unit.
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