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。
2
Yet today, these markets are unraveling.
但是现在，市场正在动荡。
3
Europe's unraveling is also a problem for Americans.