Chisels , brushes, paints - all are the products of technology.凿子 、 刷子 、 颜料 ― 这些都是工艺技术的产物.He selected the right chisels from a pile laid out beside him.他从摊在身边的一堆凿子中挑出适用的几把.They used chisels to chip the letters into the s...
跟EBC分析法一样, 新的测定法也是以分光光度法测定2 、 3—— 二烃基喹喔啉为基础.Like Analytica EBC, the new assay is based on the spectrophotometric stimation of 2, 3 - dialkylquinoxalines .二烃基 ( 基 ) 醚的萃取行为受极性和空间取代基效应的控制.The extraction behavior of dialkyl ...
There is a trend for knocking public-school headmasters and headmistresses off their perches.现在有一种推翻公立学校校长权威性的趋势。Other protection can be obtained by providing wooden perches througout the orchards.其它保护措施是可在种子园中到处设置木制的栖木....