discharge standard的用法和樣例：
例句
- National standards would have stricter limits for discharge of pollutants in key river valleys.
提高重點(diǎn)流域水污染物的國家排放標準。 - There is also a special carbon monoxide standard applicable to engine operation in low temperatures.
另有一個(gè)專(zhuān)門(mén)針對一氧化碳的排放標準，適用于低溫下的機器開(kāi)動(dòng)。
