Cách sử dụng
The expression "flash somebody a smile, look, etc." means to show someone a quick smile or glance, usually to express a positive emotion or to be friendly or polite. You can use this expression in many contexts, such as when meeting someone new, when thanking someone, or when trying to cheer someone up. It's important to keep in mind that flashing a smile or look should be done in a respectful and genuine way, rather than as a way to manipulate or deceive someone.