短语词组短語semi -arid sandy area 風沙半乾旱類型區cold semi -arid area 寒冷半乾旱區hilly semi -arid area 丘陵半乾旱區arid semi -arid area 乾旱半乾旱區northern semi -arid area 北方半乾旱地區north semi -arid area 北方半乾旱區arid to semi -arid area 乾旱 返回 semi-arid area