| 单词 | safety bell |
| 释义 | Definition of safety bell in English:safety bellnoun
OriginEarly 19th century; earliest use found in John Thomas James (1786–1828), bishop of Calcutta and writer on art. Definition of safety bell in US English:safety bellnoun
OriginEarly 19th century; earliest use found in John Thomas James (1786–1828), bishop of Calcutta and writer on art. |
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