| 单词 | sound-indicator |
| 释义 | > as lemmassound-indicator sound-indicator n. ΚΠ 1928 C. F. S. Gamble Story N. Sea Air Station xii. 188 It was the want of an adequate ground organization—guns, searchlights, and sound indicators—that handicapped pilots..in their anti-airship operations. < as lemmas |
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