名词
中文翻译：大狗
同义词：
['bulldog', 'great dane', 'large dog']
例句：
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1.The mastiff guarded the castle fiercely.
那头大狗凶猛地守护着城堡。
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2. The mastiff was a loyal companion to its owner.
这头大狗是它主人忠诚的伴侣。
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3.The mastiff's size and strength made it an ideal choice for hunting.
这头大狗的大小和力量使它成为狩猎的理想选择。