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

垫板镍可防止或金层与基料之间的移动。

Swallows begin their migration south in autumn.

燕子秋季开始向南方移。

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移的一般方法。