Nickel underplating prevents the migration between tin or gold platings and the base material.

垫板镀镍可防止镀锡或金层与基料之间的动。

Swallows begin their migration south in autumn.

秋季开始向南方迁。

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的一般方法。