n.散發(fā)；發(fā)行；排放

In addition, wetland soils are known for methane emission, a greenhouse gas. 此外,濕地散發(fā)沼氣這種溫室氣體,是人所共知的。

New regulations are aimed at reducing the vehicle emission. 新規(guī)定的目的是要降低汽車尾氣的排放。

Emission of smoke from chimneys is an offense. 在這里排放煙霧是違法的事情。

n.散發(fā)；發(fā)行；排放

n.寬恕；赦免；（疾病等）減輕；豁免；減刑