One great meteorite crater was found in Cangshan region, Shandong Province, and main impact evidences are obtained from macroscopical geologic features, local region characters and so on.

山东苍山地区发现一大型陨石坑，通过大量的勘察工作，目前已找到一些重要的证据。

youdao

Due to the minerals present in its water, the lake in the crater has a distinctive turquoise colour that is the main characteristic of this site.

由于水中的矿物质，在火山口里的湖泊具有鲜明的绿松石色，这也是这个景点的主要特色。

youdao

The main defects of laser spot welding of aluminum are crater, hot crack and porosity which created by oxide film and keyhole instability,.

焊点中存在的主要缺陷是气孔，表面下塌，热裂纹，其中气孔主要为氧化膜气孔和匙孔不稳定形成的气孔。

youdao

Although the images did not directly show water, they showed bright deposits running several hundred meters, seemingly left by material carried downhill inside the crater by running water, occasionally snaking around obstacles and leaving finger-shaped marks diverting from the main flow.

CNN: Life on Mars?