Every time you see the letter "a" followed by the letter "X," you have to press the space bar.
每当你看到字母X紧随在字母a后面，你就按下键盘的空格键。
The goal was to press the space bar on a keyboard whenever they saw a picture twice in a row.
他们要完成的任务就是在看见某张图片第二次出现时按下空格键。
Or you can use the space bar or the left and right arrow keys to move the highlight, and then press the return key.
或者使用空格键或左右箭头移动高亮显示的选项，并按回车键。
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