1·In addition, artery walls can stiffen, transforming compliant arteries into conduits like "Styrofoam tubes," Dr. Donohue says, that increase both blood pressure and the workload on the heart.
此外,动脉血管还会变硬,弹性的动脉变成“发泡胶管”,从而导致血压升高和加重心脏负担。
2·At the same time their tissues stiffen.
在此同时他们组织变硬。
3·The jelly will stiffen as it cools.
果冻冷却后会变硬。