你能帮我在钓鱼线上打个结吗？

Could you help me tie a ___knot in this fishing line?

她灵巧地打了一个复杂的结来固定船帆。

She deftly tied a complicated ___knot to secure the sail.

我好像解不开鞋带上这个紧的结了。

I can't seem to untie this tight ___knot in my shoelace.