The enamel surface microhardness was measured by a Leitzs microhardness tester.采用维氏显微硬度仪测定经饮料浸泡后牙釉质表面显微硬度的变化.The microstructure and microhardness of ths laser nulted Fe - Sb alloys were studied.研究了激光表面熔化Fe-Sb合金的显微组织和显微硬度...
The tax increase sounded the death knell for the business.税赋的增加为这个企业敲响了丧钟。It's going to be the death knell of the red deer.这将导致马鹿的灭绝。The arrival of large supermarkets sounded the death knell of many small local shop...