英语翻译计算机高手帮下啊,希望是手动翻译不是机器翻译,感激不尽.Off-the-shelf operating syst

Off-the-shelf operating systems for embedded systems began to appear in the late 1970s.Many of these were written in assembly language,and could be used only on the microprocessor for which they were written.When microprocessor became obsolete,so did its operating system,unless it was rewritten to run on a newer microprocessor.When the C language came along,operating systems could be written in an efficient,stable and portable manner.This had instant appeal to management,because it held the hope of preserving the software investment when the current microprocessor became obsolete.This sounded like a good story in a marketing pitch.Operating systems written in C became the norm and remain so today.In general,reusability of software has taken hold and is doing rather nicely.A number of commercial operating systems for embedded systems sprang to life in the 1980s.
二十世纪七十年代后期,应用于嵌入式系统的通用操作系统开始出现.它们很多是用汇编语言写出来的,只能用在编写了它们的微处理器上.随着微处理器逐渐过时,这种操作系统似乎也难逃被淘汰的命运,除非它被重新编写,以便在新一代的微处理器上运行.当C语言出现时,操作系统已可以用高效、稳定、便携的方式来编写了.这一优势颇受管理层的青睐,因为他们看到了在当下微处理器被淘汰时保全软件投资的希望.在市场方面,这同样是个传奇故事.用C语言编写的操作系统成了一种标准,至今依然如此.总地来说,软件的可再用性已深入人心,目前表现仍令人满意.在八十年代,一大批的嵌入式商业操作系统获得了新生.

把现成的嵌入式系统的操作系统开始出现在这些人汇编语言编写晚1970s.Many，并且可以用于对他们的写作微处理器只。当微处理器变得过时了，所以没有它的操作系统，除非它重写才能跑在较新的微处理器。当C语言出现的时候，操作系统可以写在一个高效，稳定和便携的方式。这已即时呼吁管理，因为它举行了保护软件投资在当前的微处理器变得过时了希望。这听起来似乎是在营销策略好故事。 C编写的操作系统成为标准和今天依然...

通用嵌入式操作系统是在1970晚期出现的。（这些系统）很多是用汇编语言写的，只能用在写有此系统的微处理器上。当微处理器过时的时候，它的操作系统也过时了，除非针对一个新的微处理器重新写入操作系统。随着C语言的到来，操作系统可以用一种有效，稳定和可移植性好的方式编写了。这一点立即吸引了管理部门，因为它带来了希望：在当前微处理器过时，软件投入依然可以保存。这在营销市场上似乎是一个神话。于是C编写的操作系...