guidepost
noun (North American English)(also signpost British and North American English)
a sign or source of information or that helps you make a decision 路标 The stock market is an important guidepost for the overall economy. 股票市场是整体经济的重要路标。
a sign next to a road that tells you where to go 路标： 道路旁的告示牌，告诉您去哪里A weathered guidepost pointed toward the town. 一个饱经风霜的路标指向城镇。