For example, the lungs and the heart muscle expand less successfully, the blood vessels become increasingly rigid, and the ligaments and tendons tighten.
例如，肺部和心脏肌肉扩张不太成功，血管变得越来越僵硬，韧带和肌腱收紧。
3
A litre of teacan contain up to 9mg of fluoride, which in excess can cause skeletal fluorosis, reducing bone quality and causing pain and stiffening of the ligaments.