The side alley was walled off from the back garden. [be V-ed P from n]
侧巷和后花园之间用墙隔开了。
...a ring of cliffs that walled off the surrounding wilderness. [VERB PREP. noun (not pronoun)]
把它同四周荒野隔开的一圈峭壁
英汉双解词典包含141091条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。