His front door is guarded by a pit-bull terrier.他的前门由一只美洲斗牛㹴看守。
He is being guarded by a platoon of police.他被一队警察保护着。
英汉双解词典包含368430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。