problem poverty is a problem in many cities assigument problem toán kinh tếbái toán phân phối ballot problem bài toán bỏ phiếu bargaining problem bài toán hợp đồng barrier problem bài toán màn chắn blending problem bài toán pha trộn bottle neck problem bài toán cổ chai boundary value problem bài toán biên trị, bài toán bờ brachistochrone problem
no problem = "You're welcome!" --- "Not a problem" has the same literal meaning as "no problem", but people don't usually use it to replace "You're welcome." Example: A: Is it okay if I leave my umbrella here?
report a problem Learn how to report a problem or request a refund for an app that you downloaded from the App Store on your Mac. Follow the onscreen instructions to sign in to your Apple Account and choose an option from the pop-up menu
