She thinks field walking can breathe fresh air and exercise is good for your health.
她认为野外行走可以呼吸新鲜的空气，锻炼身体，有益健康。
You can get some exercise by knocking a ball about a field with a friend.
和一个朋友在场上打打球会使你得到锻炼的。
The other aspect is an exercise in application field, Problem for Logistic Distribution.
最后，将算法运用于实际的物流管理中的配送路径优化问题。
The other aspect is an exercise in application field, Problem for Logistic Distribution.
最后，将算法运用于实际的物流管理中的配送路径优化问题。
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