如果人与人交往只想着利益得失，那么相识相知的愉悦也就不复存在了。

英文短句：

If people in the communications only think about gains and losses of interest, then the pleasure of knowing each other will cease to exist.

中文翻译：

如果人与人交往只想着利益得失，那么相识相知的愉悦也就不复存在了。