first down的用法和样例：
例句
- A stir began distinctly in the Saint-Leu quarter, but it did not resemble the movement of the first attack.
骚动很明显地在圣勒那方开始了，可是这次不象第一次进攻。 - However, although the Waffen-SS divisions fought superbly to repel the numerous British attacks, they were slowly being ground down in a battle of attrition.
但是武装党卫队师作战顽强，击退了英军的数次进攻，他们慢慢陷入了消耗战之中。
