单词	signal tower
释义	signal tower noun : an enclosed or armored elevated structure from which signals are displayed or controlled specifically : a switch tower for a system of railroad signals Word History First Known Use 1757, in the meaning defined above
随便看	chagas' disease Chagatai chagataies chagatais chaggae chaggas chagigah Chagos Archipelago Chagres Chagres fever chagrin chagrined chagrining chagrinned chagrinning chagrins chagual gum chaguar Chaguaramas chagul Chahar chahi chahtae chahtas chai

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