许多指令还有扩展操作码。

Many instructions also have an extended opcode.

youdao

目前，这种类型的请求内部会扩展相当于100次大型的取指令操作，所有这些都以低效率的方式保存在内存中。

Currently this kind of requests internally explode into 100's of large fetches, all of which are kept in memory in an inefficient way.

youdao

一些简单的手势操作就能够完成导航功能。这些手势操作还有一些可选的扩展功能。这样就能够用一套丰富的指令进行导航和编辑。

Navigation is based upon a few simple gestures with optional extensions that create a rich vocabulary of commands to drive powerful navigation and editing features.

youdao