| 词汇 | pebble bed |
| 释义 | Definition of pebble bed in English:pebble bednoun
OriginMid 19th century; earliest use found in Joseph Prestwich (1812–1896), geologist. Definition of pebble bed in US English:pebble bednoun
OriginMid 19th century; earliest use found in Joseph Prestwich (1812–1896), geologist. |
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