How to use the Bing dictionary back word

under Windows10 system How to use the Bing dictionary back word under Windows10 system
The details are as follows:
1, start the Bing dictionary, click on the menu bar on the left side of the window, <;生词本&rdquo ;

2. Clicking on the "back” word button in a vocabulary will pop up the statistics of the back word.

3. Click on the “Start Back” button to enter the back word interface.

4. With the left mouse button, click and hold on the circular button of “Start and Start”, a new word will appear above; at this time, the user needs to transfer the memory to determine the end. I don't know the word.

5, to determine whether you know, release the mouse, then the text on the round button becomes "ldquo; I know", and there is a button in the lower left corner of the window that does not recognize ”. According to the situation, choose which one to click.

6, in the process of clicking and holding, the circular button will become the style of the clock to start timing; if the user still has not determined whether to recognize the word at the end of the timing, the text on the round button Will become “ I don't know & rdquo;, at the same time in the lower left corner of the window, the button "Understanding".
The meaning is that there is no decision in the time period, probably I don’t know.

7. When a round of back words ends, the dictionary will pop up “ another round & rdquo; and & ldquo; no, the home is tired & rdquo; two buttons for the user to choose.