A friendship can weather most things and thrive in thin soil; but it needs a little mulch of letters and phone calls and small, silly presents every so often - just to save it from drying out completely.
友谊能经受大多数事情，在贫瘠的土壤里茁壮成长;但是它需要一些信件、电话和小的、愚蠢的礼物来保护它不被完全晒干。