간이簡易 simplicity; ease; handiness 간이식簡易式 easy-to-build type 간이식당簡易食堂 snack bar; diner; cafeteria 무역貿易 trade; commerce 교역交易 trade; commerce 난이도難易度 level of difficulty 무역국貿易國 trading partner 무역상貿易商 trader 무역업貿易業 trade business 무역업자貿易業者 trader 무역품貿易品 trade goods 무역항貿易港 trade port 밀무역密貿易 smuggling; contraband trade 역지사지易地思之 put yourself in someone else's shoes 역학易學 Science of Changes