训练结束后，他在酸痛的膝盖上擦了药油来缓解疼痛。

After training, he rubbed some ___embrocation on his sore knees to relieve the pain.

运动员在训练后使用药油按摩肌肉以防止酸痛。

The athlete used ___embrocation on his muscles after training to prevent soreness.