尤其是定向越野跑的技术训练，必须在野外进行，学校的操场是不可能代替的。
Directional technology of cross-country running train especially, must go on in field, school it is impossible for playground to replace.
尤其是定向越野跑的技术训练，必须在野外进行，学校的操场是不可能代替的。
Directional technology of cross-country running train especially, must go on in field, school it is impossible for playground to replace.
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