Things very quickly get ugly and you might even already be feeling this tension in Scratch if you're dragging and dropping and moving things around.

是不是很丑呢,如果东丢一点，西落一点,你很快就会不爽了。

哈佛公开课 - 计算机科学课程节选

It's all about dragging and dropping which is, to say, is very intuitive.

你可以把这个片段放到那里，其实就是拖动，很直观。

哈佛公开课 - 计算机科学课程节选