mas·tiff /ˈmæstəf/
大型猛犬之一種
Mas·tiff n.; pl. Mastiffs [Mastives is irregular and unusual.] Zool. A breed of large dogs noted for strength and courage. There are various strains, differing in form and color, and characteristic of different countries.
Mastiff bat Zool. , any bat of the genus Molossus; so called because the face somewhat resembles that of a mastiff.
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mastiff
n : an old breed of powerful deep-chested smooth-coated dog used
chiefly as a watchdog and guard dog