If you have difficulty sitting like this, prop up your back against a wall.如果这么坐着有困难，就背靠墙坐吧。A worker put a prop against the wall of the tunnel to keep it from falling.一名工人用东西支撑住隧道壁好使它不会倒塌.He used a box to prop the door o...
Some palms , mangroves and other tropical trees form woody prop roots , often called stilt roots.向地生长, 插入土壤,并对茎提供一定的支撑.Do red hobnail and hobnail of prop drawing form have without distinction?条彤鞋钉和回柱形鞋钉有无区别?He used a box...