After setting, the surfaces of the specimens are ground down using carborundum and alumina.凝固之后, 样品表面连续用金钢砂或氧化铝磨平.Activated carbon, alumina are often used to remove many types of organic materials from aqueous streams.常用...
After setting, the surfaces of the specimens are ground down using carborundum and alumina.凝固之后, 样品表面连续用金钢砂或氧化铝磨平.Support the transport system for alumina and fluoride to the hoppers.支撑氧化铝和氟化盐进入料斗的传送系统.Activated carbon, ...
他们时常陷入枯燥的日常事务之中。All too often they become enmeshed in deadening routines.上班时，他淹没在枯燥乏味的会海中。At work, he was chained to a system of boring meetings.新闻广播准确可靠但却非常枯燥。Broadcast news was accurate and reliable but deadly dull....