exhaustn.gases ejected from an engine as wasteproducts 废气 charcoal n. a carbonaceous material obtained by heating wood or other organic matter in the absence of air 木炭 barbeque n.a cookout in which food is cooked over an open fire 烤肉野餐 significant a.important;of consequence;having or expressing a meaning 重要的。重大的，有意义的，意味深长的 quantity n.an amountof somethingthat can be counted or measured 量，数量，许多，大量 soot n. a black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink 煤烟，烟尘 sulfur n. an abundant tasteless odorless multivalent nonmetallic element 变 dioxide n. an oxide containing two atoms of oxygen in the molecule 二氧化物 monoxide an oxide containing just one atom of oxygen in the molecule 一氧化物 oxide n. any compound of oxygen with anotherelement or a radical 氧化物 reaction n.(chemistry)a process in which one or more substances are changed into others (化学)反应 large-scale a. usually large in scope;constructed or drawn to a big scale 大规模的，大比例尺的，大范围的 pollutant waste matter that contaminates the wateror air or soil 污染物质exhaustn. gases ejected from an engine as waste products 废气 charcoal n. a carbonaceous material obtained by heating wood or other organic matter in the absence of air 木炭 barbeque n. a cookout in which food is cooked over an open fire 烤肉野餐 significant a. important;of consequence; having or expressing a meaning 重要的，重大的，有意义的，意味深长的 quantity n. an amount of something that can be counted or measured 量，数量，许多，大量 soot n. a black colloidal substance consisting wholly or principally of amorphous carbon and used to make pigments and ink 煤烟，烟尘 sulfur n. an abundant tasteless odorless multivalent nonmetallic element 硫 dioxide n. an oxide containing two atoms of oxygen in the molecule 二氧化物 monoxide n. an oxide containing just one atom of oxygen in the molecule 一氧化物 oxide n. any compound of oxygen with another element or a radical 氧化物 reaction n. (chemistry) a process in which one or more substances are changed into others （化学）反应 large-scale a. usually large in scope; constructed or drawn to a big scale 大规模的，大比例尺的，大范围的 pollutant n. waste matter that contaminates the water or air or soil 污染物质