巨集让使用者可以按一个键就执行一串指令。

Macros enable users to execute a number of commands with a single keystroke.

youdao

非常明智，可以确保在字符串指令进行逻辑上的方向寄存器的自动调整。

Very sensible - ensures that the auto-adjustment of registers in string instructions proceeds in the logical UP direction.

youdao

使用带有repeat前缀的字符串指令将该函数优化成一个非常紧密的循环。

This function is optimized as a very tight loop using string instructions with the repeat prefix.

youdao

It's a long sequence of instructions, it starts at the beginning, walks through, may jump around a little bit, but eventually comes down at the end. It's okay for the things you're doing for the early problem sets.

这是一长串指令，从开端开始，向前步行，偶尔来回跳一会儿,但是最终会走到结尾,这些足以解决最初级的问题。

麻省理工公开课 - 计算机科学及编程导论课程节选