a practice lesson的用法和樣例：
例句
- Spending too much time on an activity or lesson in a single study session creates boredom and inattention.
在一次學習中，花費過多時間在一個活動或練習課上都會讓人感到乏味，注意力分散。 - I stayed with my son at his first soccer practice and looked on as the coach worked with the boys.
我陪兒子上他的第一堂足球練習課，並於教練指導這群男孩時在旁觀看。
