The pumpkin pollen grain in the middle is0.2mm and just about visible to the naked eye
中间的南瓜花粉有0.2毫米，肉眼刚刚能看见。
2
1 white translucent translucent particles particles, which may be entrained metal chips and sand, containing visible black white grain percentage more than 1 visual inspection.
外观白色半透明颗粒半透明颗粒，其中不得夹带金属屑和砂粒，含有可见的黑点粒白色分数不超过1目测。
3
The results Show that the floating dust in Tarim Basin is monitored in the infrared and visible images, floating dust in it is gray with even grain and distinct verge.