常均是汉语词语，读音为cháng jūn，指庸常之人，犹常法。
这些河谷地带常发生季节性洪水，在一年的大部分时间内均保持较高的水位，是旱季重要的农田。
These river valley areas, which are seasonally flooded, or have high water tables for a large part of the year, are an important dry season farmland.
工艺上用的，石油是塔顶气(常减压)，化工是丁二烯装置，火炬气回收系统，石油和化工均采用过。
In the process, oil is top gas (often reduced pressure), chemical is butadiene unit, the torch gas recovery system, oil and chemical are used.
其中杂环部分常为嘧啶环或均三嗪环。
应用推荐