For concrete containing silica fume or ground slag, the reduction of auto-shrinkage is more effective by compositeaggregate.
尤其对于含硅灰或矿粉的混凝土，复合骨料降低混凝土的自收缩效果更好。
2
Aggregate information into composite pages.
把信息聚集到组合页面。
3
Some service providers can also be service requestors: they aggregate capabilities from other service providers to construct composite, higher-level services.