Backcountry travel may involve travel over both trails and off - trail areas.野外行进包括在小径上和小径以外通过....a large area of woodland with hiking and walking trails.间有远足与散步路线的一大片林地The mountains resemble anthills then, with crowds s...
Her knuckles whiten as she clenches her hands harder.她的手握得越来越紧，指节都变白了。I must whiten my tennis shoes.我得把我的网球鞋刷白.Use: Used to wash, condense and whiten the pulp.用途: 适应于浆料的洗涤 、 浓缩和漂白....
Guimeng , electric, chromium manganese, ferro - alloys such as ferromanganese products.硅锰 、 硅铁 、 铬锰 、 锰铁等铁合金产品.Demage mechanism of tap - hole for a ferro silico - manganese smelting furnace is described.阐述了锰 硅合金 矿热炉出铁口损坏...