to have legs

معتبر نبودن.
Their case didn't have legs, so they had to let it go.

To have/has legs
پتانسیل موفقیت/موفق شدن یا مورد قبول قرار گرفتن را داشتن

ادامه داشتن برای مدت طولانی
To have endurance; to have prospects to exist or go on for a long time.