体育运动给我们的眼睛、大脑和肌肉以宝贵的锻炼，使它们协同工作。
They give us valuable practice in helping the eyes, brain and muscles to work together.
眼睛睁开，让脖子肌肉放松，保持15秒钟。
Keep the eye open, and keep the neck muscle relaxed. Hold 15 seconds.
眼睛睁开，让脖子肌肉放松，保持15秒钟。
Keep the eye open, and keep the neck muscle relaxed. Hold 15 seconds.
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