It may not help you tie your shoe but that little plastic tip keeps the rest of the shoelace, the shoe string from unraveling into weak and useless threads.
它可能不能帮你系鞋带，但那小小的塑料头可以让鞋带的其余部分不会散开成脆弱无用的线。
Yet today, these markets are unraveling.
但是现在，市场正在动荡。
Europe's unraveling is also a problem for Americans.
