If you say 20 milliseconds, you might get called in 25 milliseconds one time, then a second later the next time.
如果规定20毫秒,但实际上可能第一次在25毫秒时调用,下一次却要等到一秒钟以后。
When obtaining information you can use a get request to obtain a specific value, or GETNEXT to get the next property from the last one you read.
在获得信息时,您可以使用GET请求来获得某个特定值,或者使用GETNEXT来获得上次读取的属性的下一个属性。
In the next section, you will get a chance to actually build one yourself.
在下一部分中,您将有机会亲自构建一个选择器。
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