So ...  So I take it into the start position, and then I press the read button.  So it's taking a little reading from you.  And then the pointer goes and points to three different options.
呵呵 好，现在我从头开始，然后 我按下阅读键 于是，它就开始测量了你的那些指标了 然后指针就指向三个不同的标准