他伸手捂住她的嘴,不让她叫喊.
He put his hand over her mouth to stop her screaming.
over有表示蒙起来的意思：
spread the tablecloth over the table(把桌布铺在桌上).
他伸手捂住她的嘴,不让她叫喊.
He put his hand over her mouth to stop her screaming.
over有表示蒙起来的意思：
spread the tablecloth over the table(把桌布铺在桌上).