striation, scratch marks [straɪˈeɪʃn] 名词
- striation
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单语范例（未经PONS编辑处理）
The first whorl is marked by several slender strongly incised spiral lines, the remaining with numerous very fine closely crowded, wavy, spiral striations.
en.wikipedia.org The species may have subtle spiral striation, although there exists considerable variation; axial growth lines are clearly visible.
en.wikipedia.org It is marked by lines of growth and spiral striations comparable to those on the spire.
en.wikipedia.org The striation's direction reveal the movement directions in the fault plane.
en.wikipedia.org Instead, the striations, which were previously reported shatter cones, are identified as ventifacts created by wind erosion in sandstones.
en.wikipedia.org