A small mistake in a program is called a bug.
程序里的小错误，英文叫bug。
"Bug" means a real insect.
bug这个词，本来是指虫子。
In 1947, a fly got stuck inside a computer.
1947年，一只飞蛾飞进了电脑里。
Workers took it out and taped it in a book.
工作人员把它夹出来，贴在本子上。
They wrote "first real bug" next to it.
旁边还写下了“第一个真正的bug”。
After that, every error was called a bug.
从那以后，每个错误都叫bug了。
