1、
Dogs are not permitted either inside or outside the building, with the exception of guide dogs.
除了导盲犬,不允许狗待在这幢楼内或楼外.
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2、
3、
Guide dogs were first trained after World War I when many soldiers returned home sightless.
一战之后许多士兵由于失去视力而返回家园,这时候开始了对导盲犬的训练.
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4、
