intensity of training

例句：

1. 1. The intensityof the training was high, requiring a lot of effort from the participants.
   训练的强度很高，需要参与者付出很多努力。
2. 2.The intensity of the training varied depending on the level of the participants.
   训练的强度根据参与者的水平而变化。
3. 3. The intensity of the training was designed to improve the participants' skills and knowledge.
   训练的强度旨在提高参与者的技能和知识。