全国的核武器工厂均受到了有毒废弃物的严重污染。Nuclear weapons plants across the country are heavily contaminated with toxic wastes.他们应当停止从油轮上往海里倾倒废弃物。They should stop offloading waste from oil tankers into the sea.放射性废弃物有严重污染的危险.There is a dan...
他用木楔子取代钉子制作家具。He builds furniture using wooden pegs instead of nails.他用锤子把楔子砸入石缝里。He hammered the wedge into the crack in the stone.这扇窗户关不严,得用楔子上了.The window doesn't stay closed unless you wedge it....