warm-up factor

例句：

1. 1.The team's performance was significantly improved after the warm-up.
   经过预热，团队的表现有了很大的提高。
2. 2. The new machine has a high warm-up factor, which is very beneficial for its operation.
   这台新机器的预热系数很高，对其运行非常有利。
3. 3. During the warm-up period, the athletes focused on their breathing and body movements to improve their performance.
   在热身阶段，运动员们专注于呼吸和身体动作，以提高他们的表现。