The key to the exercises presented below is to maintain good form and don't look sloppy stretching.

下面的练习的关键是保持良好的姿势，拉伸不要看起来草率。

youdao

This is the key to singing - learning about the art, doing practical exercises, and by listening to others who have a well-trained voice.

这是学习唱歌的唯一途径。 培养艺术感，做实际练习，听那些训练有素的歌手演唱。

youdao

The key is to strengthen sport consciousness of the student and make them have the correct physical education concept in the training of the lifelong physical exercises.

体育意识是人们对体育客观现实的反应，培养学生终身体育化，关键是强化学生的体育意识，使其树立正确的体育观。

youdao

Since the manual with instruction and photos for how to correctly perform the exercises is not available, my summary is meant as an outline for the key components of a comprehensive knee-injury prevention program.

CNN: How do I protect my daughters' knees from sports injuries?