natural flag 中文意思是什麼
natural flag
解釋
天然鋪路石板-
When unfortunate events causing especially serious casualties occur or when serious natural calamities have caused heavy casualties, the national flag may be flown at half staff as a token of mourning
發生特別重大傷亡的不幸事件或者嚴重自然災害造成重大傷亡時,可以下半旗誌哀。
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