| 单词 | buttress-roots |
| 释义 | buttress /butˈrəs/noun
To prop or support with, or as if with, a buttress ORIGIN: OFr bouterez, from bouter to push, bear against buttˈress-root noun A root, often growing from the trunk, that helps to keep a tree upright buttˈress-thread noun An asymmetric screw thread with one face at right angles to and the other inclined to the shaft |
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