例句與造句

1. A charge forms and moves downward in 50-yard steps called step leaders.
2. As the step leader of a lightning bolt jumps toward the ground, it steps toward the grounded objects nearest its path.
3. In the case of a lightning leader, each extension ( called a step leader ) is typically 10  50 meters in length.
4. It's difficult to find step leader in a sentence. 用step leader造句挺難的