硫化染料因其有毒而受到注意.The sulfur dyes are noted for their toxic properties.他认为碳最初和硫酸钙反应生成硫化钙.He postulated that the carbon reacts initially with the sulfate to form calc ium sulfide.第三个例子是前章提到的硫化亚铁.A third example is the ferrous...
Grease two sturdy baking sheets and heat the oven to 400 degrees.在两块结实的烤板上抹些油，把烤炉加热到400度。There was a sturdy plumpness about her hips.她的臀部浑圆结实。a sturdy pair of boots一双结实的靴子...