The castle had a deep moat which emptied into the lake.城堡有一条很深的流入湖里的护城河.A fire on the city gate brings disaster to the fish in the moat.城门失火，殃及池鱼。The medieval town was fortified with a high wall and a deep moat.这座中世纪的城市用...
He decided to do something about reforesting man-made wastes of western Australia.他决定为在澳大利亚西部人为导致荒芜的土地上重新造林做点事情。Cats positively revel in heat, whether natural or man-made.猫确实喜暖，不管是自然的还是人工创造的温暖环境。These man-made barriers w...