a fishing line的用法和样例：
- He made a cast with a fishing line.
- A throwing of a fishing line or net into the water.
- A short length of gut, wire, or similar material by which a hook is attached to a fishing line.
- A snarl formed in the part of a fishing line that is wound around the reel.
- To throw something, especially to throw out a lure or bait at the end of a fishing line.