Check that your head is in line with your spine.

检查你的头和脊椎是否已成一直线不要弯曲。

youdao

Check that your head is in line with your spine.

检讨你的头和脊椎是否已成始终线不要曲折。

youdao

Check that your head is in line with your spine.

检讨你的头和脊椎是否已成始终线不要曲折。

youdao