Propensity scores are used to reduce selection bias by equating groups based on these covariates.
倾向得分通过平衡各组的协变量的方法，用于降低选择偏倚。

The fundamental objective of the program is to reduce poverty on the archipelago by half by 2010.
项目的基本目标是到2010年减少一半的贫困人口。

Usually, field balancing is selected to eliminate or reduce the vibration caused by the unbalance.
一般可采用比较成熟的现场动平衡方法消除转子不平衡。

How to reduce Zn depletion in galvanizing by dipping is a problem concerned by production factory.
如何降低热浸镀过程中锌的消耗是生产厂很关心的课题。

Study of Photocatalytic Degradation of Sulfosalicylic Acid on Titanium Dioxided Reduce by Hydrogen
氢还原二氧化钛光催化降解磺基水杨酸的研究

According to rough calculation, Guangdong enterprises to reduce the tax burden by 130 billion yuan.
据粗略计算，广东企业将减少税负达130亿元左右。

He was perfect in divination and often helped others reduce troubles, so he was respected by people.
他非常精通卜算术，多次帮人排忧解难，深受人们尊重。

I think that will be too much for two persons. It would be better to reduce the number by two dishes.
我想那对两个人来说太多了，减少两道菜比较好。

By organizing ownership of components by geographical distribution you reduce communication barriers.
通过组织地理分布的组件所有权，您减少了沟通的障碍。

Should continue l 0 ng expected,by cutting short expected to reduce short head,reducing wear and tear.
应先断长料，后断短料，减少短头，减少损耗。

Through emulation, these two approaches can reduce or eliminate the vibrations caused by unbalance forces.
通过仿真，两种方案均能减小或消除振动力。

Reduce the number of miles you drive by walking, biking, carpooling or taking mass transit wherever possible
少开车，多步行或骑自行车，多乘大众公共交通

The appeal court reduce the fine impose by the magistrate or reduce the sentence to seven year imprisonment.
上诉法院减少了治安法官所罚的款额或将刑期减少到7年。

It could also decrease the frequencies of wet manure induced by folium senna and reduce the water production.
并且能有效减少番泻叶所致的肠道水分的增加。

Vascular endothelial growth factor165 can reduce the cerebral lesion caused by focal cerebral ischemia in rats
血管内皮生长因子165对局灶性脑梗死得影响

A major effort was required by developed countries to liberalize trade in agriculture and to reduce subsidies.
发达国家应作出重大努力，将农业贸易自由化并减少津贴。

Added antioxidants to the alkine hydrolysis system was able to reduce loss of ferulic acid caused by oxidation.
碱水解体系中添加抗氧化剂能减少阿魏酸的氧化破坏。

Switching to this downsized bomb would reduce the area affected by radioactive fallout by a factor of about 10.
改用这种减量化的核弹，可将放射性落尘的影响范围缩小到110。

This advantage can reduce the mold wall movement caused by the graphitization expansion of ductile iron casting.
这一特点可以减少球铁石墨化膨胀引起的型壁移动。

By marketing the snuff bottles online, the auction house would seriously reduce the costs associated with the sale.
通过在线销售鼻烟壶，该拍卖行可大大降低交易费用。

Becoming protected against the disease at an earlier age could reduce the number of emergency room visits made by families.
在更早的阶段预防这种疾病能够减少家庭急诊的数量。

It is proposed to carry through Slope Treatment by cutting slope to reduce load and Prestressed Cable Reinforcement Scheme.
建议采用削方减载和预应力锚固方案进行边坡治理。

The addition of saccharifying enzyme could improve liquor yield and reduce liquor acidity produced by both the two species.
在添加糖化酶后, 两种米种的酒分均有所提高, 而酸度降低。

Data from a new study of 120,000 nurses suggest that protein from poultry and dairy foods-but not from red meat-may reduce by one-third the risk of dying of cancer.
一组基于12万名护士的研究数据显示，源自家禽和奶制品而非牛羊肉的蛋白质可以将癌症死亡率降低1。

If any cells show signs of the early mutations that lead to cancer, doctors can suggest the drug tamoxifen, which is believed to reduce the risk of breast cancer by suppressing precancerous cells.
如果有任何细胞呈现早期致癌的变异，医生可建议使用它莫西芬，这是一种有效抑制早期癌细胞的药，可减少癌病的发生。