Definition: parts of the body that work together in order to make something happen Level: C2
长期压力会对人的免疫系统产生有害影响。
Chronic stress can have a detrimental effect on a person's immune ___system.
富含纤维的饮食对你的消化系统有益。
A diet rich in fiber is beneficial for your digestive ___system.
中枢神经系统可以说是人体最复杂的部分。
The central nervous ___system is arguably the most complex part of the human body.
