The oligochitosan and chitobiose, produced by degrading chitosan, have exhibited some particular physiological activities and function.摘要壳聚糖降解制备的低聚壳聚糖和壳寡糖具有许多独特的生理活性....
她对日语的熟谙使我惊奇.Her familiarity with Japanese surprised me.合格的外语教师还很缺乏, 尤其是教法语和日语的.There is a shortage of well qualified teachers of foreign languages, especially of French and Japanese.日语学校惨淡经营,学日语的学生人数每况愈下.With student enr...