a three-pronged attack的用法和样例：
- At the same time, they would set up a nuke at another of the enemy’s expansion.They could plan all this out to occur at the same time to overwhelm the enemy with a three pronged attack.
- A three - pronged spear used in fishing.
- It is a three ring circus to watch that silly dog play.
- He discarded a three,and picked up a Queen.
- A three piece suite has two chairs and a sofa.
- For this shot, I need a three wood.