鞋带的用法和样例：
例句
-
我的鞋带松开了。
My shoe laces have come undone. -
我解不开鞋带。
I can't undo my shoelaces. -
我给足球鞋穿鞋带时总是遇到麻烦。
I always have troubles lacing these football boots. -
如果你不系好鞋带，你会被绊倒的。
If you don't lace up your shoes, you'll trip over. -
我帮他系好靴子的鞋带。
I help him to lace up his boots.
