研究人员还测算出了一个名为横断面的暗物质的特性，横断面剖析描述了粒子之间相互作用的可能性的大小。
Researchers also calculated a property known as the cross-section, which describes how likely the particle is to interact with others.
当代基础研究可分为四大类：纯基础研究、横断性基础研究、应用基础研究、综合性基础研究。
Contemporary basic research can be scientifically classified into four groups: pure basic research, intersect basic research, applying basic research and integrate basic research.
研究方法1设计方案采取横断面纵向研究与前瞻性随访研究相结合的方法。
Methods1 DesignTo take cross-sectional longitudinal study with follow-up study of a combination of forward-looking approach.
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