1)trench,n.&v.(挖)沟，(挖)战壕2)excavate a trench,挖壕沟.3)trenching method,挖壕沟法4)trench excavator,挖沟机;挖沟杈;挖壕沟机5)To dig trenches for protection.,挖沟壕来防护6)To dig or occupy a trench.,挖或占据壕沟
用法和例句
A trenching method and root biomass regression method were used to determine the contribution of root respiration to total soil respiration in a subtropical forest ecosystem.