Analysis of Hydrocarbon and Sterol in Spring Latex of Euphorbia tirucalli by Gas Chromatography/Mass Spectrometry The Changes of Aroma Components in Kiwifruit after Harvest Analysis of volatiles from Laguncularia racemosa in Beihai, Guangxiby ATD-GC/MS and evaluation on safe property of the tree Components of the Essential Oil in Isodon henryi (Hemsl.) Kudo The Changes of Aroma Components in Kiwifruit after Harvest The Analysis of Components for Oenothera concrete