Nickel underplating prevents the migration between tin or gold platings and the base material.
垫板镀镍可防止在镀层与基料之间的移动。
Swallows begin their migration south in autumn.
燕子在秋季开始向南方迁移。
A general method of data migration between heteroid databases was discussed subsequently.
其次讨论了异构数据库间数据迁移的一般方法。
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