Synthesis and Function Studies on New Porphyrin Lanthanide Liquid Crystals Compounds.红光发射材料卟啉化合物的合成及其电致发光性能的研究.Lanthanide ions were incorporated through the sol - gel process.在溶胶 - 凝胶过程中引入稀土离子来制备发光材料.The promotion effect...
Wreaths were laid at the martyr's tomb.烈士墓前安放着花圈.Wreaths are woven of wool, feathers, or even human hair.还有人将羊毛 、 羽毛 、 甚至头发编织成花环.All the morning wreaths and crosses of beautiful flowers had poured in.整个上午,饰有美丽鲜花的花圈和...