When you're writing in script, there are four letters of the alphabet that you can't complete in one stroke.
当你用连写体书写时，字母表里有4个字母你不能一笔写完。
《柯林斯英汉双解大词典》
2
Because of the randomicity of handwritten characters, handwritten stroke or Chinese characters are depended on user, time, writing condition, equipment and circumstance.
由于手写的随机性，手写的笔画或汉字因人而异、冈时而异、因书写条件、设备和环境而异。
3
Can grasp Chinese character stroke, the stroke order and the writing rules, may carry on the transcription and the simple dictation of Chinese characters.