这三个字符形成了JSP指令语法的开始序列。

Those three characters form the opening sequence of JSP directive syntax.

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因此，执行字节码指令要比访问语法树节点快得多。

Therefore, executing a bytecode instruction is much faster than visiting a syntax tree node.

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基于文本语法的计算指令对于我们大多数人来说会更加自然和高效。

Computing languages are more natural and efficient to most of us based on a textual syntax.

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But because we're now programming a computer at a lower level and because as we said last week, you really have to be precise and then careful to instruct this machine, this fairly dumb machine that will only do what you tell it to do very specific instructions, do we have to use a more precise syntax than just a puzzle piece might have previously allowed.

但是我们是要在电脑的低平台上编程不是吗？,那我们就要像我上周提到过的那样，一定要小心，小心，再小心地,操纵这台又聋又哑的机器,它只会根据你敲进去的,特定指令来做事，所以我们必须使用非常精细的语法,而不是模模糊糊，让人费解的概念。

哈佛公开课 - 计算机科学课程节选