a plan or method that you use if another one fails, or is likely to fail طرح یا روشی که در صورت شکست، یا احتمال شکست آن، از دیگری استفاده می کنید. We had no Plan B to fall back on. A second shaft is being drilled as a plan B, in case the original bore hole encounters problems. ... [مشاهده متن کامل]