在苏加塔湖溢流向图尔卡纳湖的长期过程中，波浪作用在这些曾经的湖岸线上刻蚀出槽口和台阶形痕迹。
During a protracted period when Lake Suguta was overflowing into Lake Turkana, wave action carved notches and terraces into these fossil shorelines.
低能离子束注入对细胞的刻蚀作用提供了外源遗传物质进入细胞的途径。
Ion implantation may echo on plant cell, thus provide convenicence for foreign genetic material transferring into cell.
结果表明，氨等离子处理会对膜表面产生一定的刻蚀作用，从而影响膜表面的粗糙度及氨基接枝密度；
The results showed that plasma treatment would etch film surface, which would affect the roughness of film surface and the density of grafted ammonia group.
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