问答题
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Large-scalepublicservices,suchaswaterandpowersupplies,r...
问答题Large-scale public services, such as water and power supplies, road, rail and radio communications, etc. needed to support economic activities, esp. industry, trade and commerce（）
apersonwhocarriesoninsuranceasabusiness（）
问答题a person who carries on insurance as a business（）
torestrictone’seconomicactivitiestocertainparticularfie...
问答题to restrict one’s economic activities to certain particular fields （）
