l开头的单词褒义

　　例句：

　　Experimental research for the hydrothermal degradation system of labile organic compounds

　　可降解有机物湿解实验研究

　　Significant seasonal variation of soil labile organic carbon was found.

　　土壤活性有机碳含量具有明显的.季节性变化特征。

　　Content and seasonal change in soil labile organic carbon under different forest covers

　　不同森林植被下土壤活性有机碳含量及其季节变化

　　Labile organic matter and carbon management index in red soil under long-term fertilization

　　长期不同施肥下红壤活性有机质与碳库管理指数变化

　　The contents of soil labile organic matters were increased with time during study period.

　　土壤各活性有机质含量随时间的推移而增加。