back and fill
زبان مبدأ: انگلیسی
ترجمه به فارسی
- واژهنامه · Merriam-Webster Collegiate Dictionary back and fill 1 : to manage the sails of a ship so as to keep it clear of obstructions as it floats down with the current of a river or channel 2 : to take opposite positions alternately : SHILLY-SHALLY