equilibrium
noun [ S or U ] formal uk/ˌek.wɪˈlɪb.ri.əm/ /ˌiː.kwɪˈlɪb.ri.əm/ us/ˌiː.kwəˈlɪb.ri.əm/ /ˌek.wəˈlɪb.ri.əm/
平衡；均衡
a state of balance
The disease destroys much of the inner ear, disturbing the animal's equilibrium. 这种疾病破坏动物内耳的大部分组织，妨碍其保持均衡。
the country's economic equilibrium 该国经济的均衡发展
（心情或情绪的）平静，安宁;心理平衡
a calm mental state
Yoga is said to restore one's inner equilibrium. 据说练瑜伽可以使人恢复内心的平静。
chemistry specialized平衡
the state in which the reactants (= substances involved in a chemical reaction) and products (= substances produced in a chemical reaction) do not change because the rate of forward reaction (= when products are produced from reactants) is equal to the rate of reverse reaction (= when the original reactants return from the products)