tried-and-true- -
tried-and-true——“经得起时间考验的，经过试验证明是可靠的。”
详解：If something is tried-and-true, it means that has been tried and tested and shown to be true, reliable or successful. For example ,if a cookbook has tried-and-true recipes, it means that the recipes in the cookbook have all been tried and proven to produce the delicious food .If a cure for illness is tried-and-true, then the cure has been tested and cured the people of the illness. A friendship is tried and true if the two of you have been through difficult times and ralationship ,yet have still been able to remain as friends.
例：
If the two of you treat each other sincerely, you’ll have a friendship that’s tried-and-true.
(如果你们彼此真心对待，你们就拥有经得住考验的友谊)
This is our tried-and-true method. We’ve done it many times and we know it works.
(这是我们经过证明的可靠的方法，我们已经做过许多次，并且知道行得通的。)