Study found that female smokers smoke every 10 years, bone mineral density is reduced by 2.3%-3.3% fall in bone density leading to fractures and osteoporosis incidence rate rose significantly.

研究发现，女烟民每吸烟10年，骨矿物质密度就会降低2.3%―3.3%，骨质密度下降会导致骨折和骨质疏松症发病率大增。

youdao

The experimental results show that the engine performance with this system is reliable, and the specific fuel consumption and the density of exhaust smoke are greatly reduced.

试验结果表明，增设的供水系统工作性能的可靠，掺水燃烧时比油耗及排烟度等明显下降。

youdao