截蓄堦段;截蓄阶地 absorption type terrace: 垄形阻流梯地channel type terrace: 槽式梯田channel-type terrace: 槽形阶地graded-channel type terrace: 斜沟式阶田terrace-type pit: 梯段式露天矿下载手机词典可随时随地查词查翻译