More often, all of the materials exposed to the etchant have a finite etch rate.通常, 所有暴露在刻蚀剂中的材料都具有一定的刻蚀速率.Hydrofluoric acid of Porcelain Etchant and phosphoric acid of UNI - ETCH are severe eye and tissue irritants.瓷酸蚀剂...
Finally the structures were released in a 49 % HF etch.最后在49%F中腐蚀形成这些结构.More often , all of the materials etchant have a finite etch rate.剂中的材料都具有一定的刻蚀速率.Can some one suggest a suitable etch or sequence of etches to achi...
他没能从疑犯照片中指认出格雷厄姆，但后来在警方安排的列队辨认中把他挑了出来。He failed to identify Graham from photographs, but later picked him out of a police line-up.奥运会以参赛各国运动员的列队行进开始.The Olympic Games begin with a parade of all the competing nations.那个令人...
This event antedates the discovery of America by several centuries.这件事比发现美洲早几个世纪.This old carriage antedates the invention of the car.这辆旧马车是在汽车发明前就存在的.This event long antedates the arrival of Columbus in America.这件事的发生远在...
我过去在医院里做保洁员.I used to work as a cleaner in a hospital.保洁员的手臂上都戴了红袖箍.All the cleaners wear red sleeve badges around their arms.你好,保洁员, 去找找你们的经理.Hi cleaner, go and find your manager....
Betty took a photograph of us...贝蒂给我们照了张相。Do you think betty and bertie are girls of the old school?你认为贝蒂和伯蒂是保守的女性 吗 ?Betty had no idea what male chauvinism was.贝蒂不知道大男子主义是怎么回事.What was Betty getting at when she said she...