A major number indicates a potential incompatibility between library versions.
主版本号表明程序库版本之间的潜在不兼容性。
At present, there is a large number of information in engineering techniques, above all, there is the grey incompatibility information, people have to find a reasonable method to solve it.
当前，在工程技术中存在着大量的信息，特别是灰色不相容信息存在，致使人们不得不寻求合理解决问题的方法。
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