0 (of an arrangement or relationship) involving two or more people or groups that help or do the same things for each other -- lẫn nhau
The two women had a reciprocal arrangement by which they would look after each other’s child while the other was working.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
Chúng tôi có thể hoàn thành nó từng bước dù con đường dài đến đâu và nó không thể hoàn thành dù con đường ngắn đến đâu nếu bạn thậm chí không đánh dấu dấu chân của mình.