你必须留在你所在的郡界之内。
You have to stay within your county boundary .
边界；界限；分界线国界郡界边界变化/争端那道篱笆是我和她的地之间的地界。
national boundaries ( BrE ) county boundaries boundary changes / disputes The fence marks the boundary between my property and hers .
伦敦以其四周的六郡为界。
London is bounded by the Home Counties .
郡界