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unsettled adj.1.易變的,(天氣等)不穩定的;(意見等)動搖的...

unsettling

“ frontier “ is used of an inhabited region close to wild , unsettled territory , especially in north america in the early days of white settlement . “frontier”用于指接近荒野的、無人煙的居民區,尤指于北美白人定居的初期。