sir·loin /ˈsɝˌlɔɪn/
牛的上部腰肉
Sir·loin n. A loin of beef, or a part of a loin. [Written also surloin.]
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Sur·loin n. A loin of beef, or the upper part of the loin. See Sirloin, the more usual, but not etymologically preferable, orthography. [Also spelled sirloin.]
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sirloin
n : the portion of the loin (especially of beef) just in front
of the rump