塑料涂层能防潮.A plastic coating repels moisture.很多现代的木船将采用环氧涂层作底漆。On many modern wooden boats, epoxy coatings will have been used as a base for varnishing.硫酸腐蚀了这块金属上涂层剥落的地方.The sulphuric acid ate into the parts of the metal wh...
实际上，它是用来将铀浓缩以制造武器。It was actually used for enriching uranium to weapons-grade levels.铀可溶解于海水。Uranium is soluble in sea water.在每1000个铀原子当中,只有七个是铀235.Only 7 uranium atoms of every 1,000 are U - 235....