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黄砂, 黄沙, こうさ, おうさ
1. yellow sand, yellow dust, Asian dust, dust carried on high winds from Mongolia, northern China, and Kazakhstan
2. loess
3. desert
黄沙、黄尘、亚洲沙尘,由强风从蒙古、中国北部和哈萨克斯坦吹来的沙尘;黄土;沙漠
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ご無沙汰, 御無沙汰, ご不沙汰, 御不沙汰, ごぶさた
1. not writing or contacting for a while, neglecting (failing) to write (call, visit, etc.), long silence
一段时间内不写信或不联系,疏于(未能)写信(打电话、探望等),长期沉默