| 单词 | tuff |
| 释义 | Word Frequency tuff(tʌf) noun a rock formed by the fusing together on the ground of small rock fragments (less than 2 mm across) ejected from a volcano Derived forms tuffaceous (tʌˈfeɪʃəs) adjective Word origin C16: from Old French tuf, from Italian tufo; see tufa |
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