中学英语园地A S窄线宽半导体激光器c h o o lG a r d e n O f E n g l i s hAn Unfo rg e tta b le Exp e rie nc e18惠北京顺义一中高一(9)班杨茵婷When I w as v ery young,I lived in the city w ith my father and mother.T hey lo ved me ver
MacAdam ellipses for one of MacAdam's test participants, Perley G. Nutting Jr. (observer "PGN"), plotted on the CIE 1931 xy chromaticity diagram. The ellipses are ten times their actual size, as depic