oxygen-containing material 中文意思是什麼
oxygen-containing material
解釋
含氧物質- oxygen : n. 【化學】氧,氧氣。
- containing : 包含,容納,含有的,包含的,封閉的
- material : adj 1 物質的(opp spiritual)。2 身體上的,肉體上的;物慾的,追求實利的;卑俗的。3 有形的,實體的...
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Whereas being influenced by environment factors and influx material characters, urban rainwater is polluted in some degree and its content of chemical oxygen demand ( cod ) reaching thousands mg / l and containing some poisonous matter such as heavy metal etc. if this polluted rainwater is filled to ground, it must pollute groundwater
但由於城市環境因素和匯水面材料的影響,城區雨水受到相當程度的污染, cod可高達數千毫克每升,並含有重金屬等有毒物質,如果將這些雨水直接回灌地下勢必污染地下水源。
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