The glassblower must turn the pipe constantly so that the thick liquid glass does not fall off the end.
VOA: special.2009.09.16
If someone could figure out how to turn off messages, that would be great .
如果谁可以解决怎么关掉消息,那将会非常不错的【笑声】
If the temperature drops below a certain level it sends a signal, 'turn on the heat', and that signal stays on until it gets a negative signal to turn off.
如果温度降到一定程度以下时,探测器会发送一个信号,打开加热器,直到加热器再收到关闭的信号,它就会一直开着
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