以上三种原因一致行动，以致于到了二十世纪七十年代末，控制论的就此枯萎消亡。
All three reasons conspired so that by the late 1970s cybernetics had died of dry rot.
上述三种原因造成的事故占事故总数的8成以上。因此，要杜绝事故的发生，必须首先从这三方面加强控制。
The three causes of accidents accounted for the total number of incidents into more than 8. Therefore, to prevent accidents, must first from these three aspects to strengthen control.
特别是在以上三种腐蚀因素同时存在的情况下 ，腐蚀原因更难以分析。
The corrosion problems have been paid more attention. The reasons of corrosion are difficult to analyze under the environment.
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