HSK 3
牛
niú名（形）
ox; cow; bull; newton (abbr. for 牛顿); (slang) awesome; surname Niu
爷爷家养了两头牛。
Yé ye jiā yǎng le liǎng tóu niú.
Grandpa's family raises two cows.
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Appears across levels (3（5）) in the HSK 3.0 word list.