47 、It's a gel which can welldissolvevarious paints and varnishes.───一种对各种油漆和清漆有强溶解作用的胶状物质。 48 、Silver azide does notdissolvein water or in nitric acid.───叠氨化银不溶于水或硝酸。 49 、Most of these problems won't simplydissolve.───大多数这些问题不会简...