Social support also improves the health of individuals .

社会支持还能改善个人健康。

As the economy improves , they will leave the enterprise , " izzo says .

只要经济形势改善，他们就会离开该公司。”

Fuel economy improves , emission standards tighten , and frugal engineering is key .

燃油经济性会进一步改善，排放标准会进一步提高，低成本的工艺技术将成为关键。

But it also improves people 's health .

但这也能够改善人们的健康。

For example , genetic diversity improves disease resistance .

例如，基因多样性能够提高抗病能力。