That's what happens when you're the world's biggest creditor: you get to drop hints like that, which would be enough by themselves to create international economic chaos if they were ever leaked.
出自-2012年12月阅读原文
Russian and American spacecraft also found hints that its ancient climate might have been wetter, cooler, and possibly, even friendly to life.
2019年6月六级真题（第二套）听力 Section C
柯林斯高阶英汉双解学习词典释义
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A hint is a suggestion about something that is made in an indirect way.