私有: private, privately-owned...
山脉: mountain range...
牙膏: toothpaste...
胡子: beard, mustache or whiskers, facial hair, (coll.) bandit...
却: but, yet, however, while, to go back, to decline, to retreat, nevertheless, even though...
净: clean, completely, only, net (income, exports etc), (Chinese opera) painted face male role...
问题: question, problem, issue, topic...
富人: rich person, the rich...
窗口: window, opening providing restricted access (e.g. customer service window), computer operating system window, medium, intermediary, showpiece, testing ground...
局限: to limit, to confine, to restrict sth within set boundaries...