然而，建立和维持这样的跨国联系的困难是很容易被低估的。
However, the difficulties in establishing and maintaining such interactions across national boundaries are easily underestimated.
然而，建立和维持这样的跨国联系的困难是很容易被低估的。
However, the difficulties in establishing and maintaining such interactions across national boundaries are easily underestimated.
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