keep one's body in shape

例句：

1. 1. We need to keep the windows closed to prevent the cold air from entering.
   我们需要把窗户关起来，以防冷空气进入。
2. 2. The team needs to keep training to improve their skills.
   这个团队需要继续训练来提高他们的技能。
3. 3. Keeping up with the latest technology is essential for success in today's fast-pacedworld.
   跟上最新的技术对于在当今快节奏的世界中取得成功是必要的。