演习

例句：

1. 1. I need to exercise more to stayfit.
   我需要多锻炼才能保持健康。
2. 2.He exercises every morning before work.
   他每天早上上班前锻炼。
3. 3. Running is a greatway to exercise and relieve stress.
   跑步是一种很好的锻炼方式，可以缓解压力。