free practice的用法和樣例：
例句
- Thebalance of my car was better than in yesterdays free practice, butstill not perfect for a single timed lap.
我的賽車的平衡性比在昨天的自由練習中要好，但是對於跑單個計時圈來說仍不夠理想。 - On Friday, the car was oversteering, but this was caused by a problem in the right, rear shock absorber, which we only found out about after the practice.
周五，賽車轉向過渡，但這是由右面的一個問題引起的，是後部的減震器，我們在自由練習后就發現了。
