A transparent cover is provided to protect the disc against accidental marking or smudging.圆盘外有透明的防护罩,以免偶然在圆盘上弄上污点或线迹.Consider phthalates, those chemicals that help preent makeup from smudging.如酞酸盐, 这些化合物用于帮助化妆品防止脱落.As i...
NMA was hydrogenated to 3 - amino - 4 - methoxyacetanilide ( AMA ) with S - Ni as catalystin liquid phase.以改性的骨架镍为催化剂催化3-硝基-4-甲氧基乙酰苯胺(NMA)液相选择性加氢制备了 3- 氨基 -4- 甲氧基乙酰苯胺 ( AMA ).Isoprene could be deeply hydrogenated to isop...
The British, Australian and Turkish Prime Ministers laid wreaths at the war memorial.英国首相、澳大利亚总理和土耳其总理向战争纪念碑敬献了花圈。All the morning wreaths and crosses of beautiful flowers had poured in.整个上午,饰有美丽鲜花的花圈和十字架蜂拥而入.Throw wreath...