direct indicator meaning in English

正指标
直接指示
指向器

These end permian fullerenes are also associated with shocked quartz , another direct indicator of impact
与这些二叠纪末期富勒烯一齐发现的，还有变形石英，即另一个撞击的直接遗迹。
Include direct indicators that report on the results of the environmental programmes implemented in absolute terms e . g . total tonnes of paper collected for recycling
加入直接的参数，汇报环境工作纲领的绝对成果如回收废纸的总公吨数