“牵拉”用英语怎么说？

我们陷入泥里时,牵拉更费劲了.The tug stiffened when we got into the mud.回头浪在浪碰到海岸后,撤回的浪向海的牵拉.The seaward pull of receding waves after they break on a shore.目的: 探讨牵拉性撕脱伤血管上的E-选择素的变化.Objective : To investigate the difference of E - Sele...