thun·der·head 
(thŭndər-hĕd′)
(thŭndər-hĕd′)n.
The swollen upper portion of a thundercloud, usually associated with the development of a thunderstorm.
| 单词 | thunderhead |
| 释义 | thun·der·head (thŭndər-hĕd′)n. The swollen upper portion of a thundercloud, usually associated with the development of a thunderstorm. |
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