This question involved some basic knowledge of computer keyboards and typing software. The keys on the keyboard usually correspond to a code that is recognized by the computer program. When a key was pressed, the program would read the code of the key and perform the corresponding operation. However, sometimes the program might misjudge the meaning of certain keys, causing skipping or jumping when typing. This could also be a problem with the typing software. Some typing software may have misjudgment or error correction when recognizing the keyboard code, resulting in skipping lines or positions when typing. To avoid this, the person typing had to check the code on the keyboard before typing to make sure that the input matched the meaning expected by the computer program. At the same time, the user could also use some typing techniques such as staggering the keys to avoid skipping.