Migration is usually defined as "permanent or semipermanent change of residence".

移民通常被定义为“永久或半永久的居住变化”。

youdao

In machine construction, couplings are used to effect a semipermanent connection between adjacent rotating shafts.

机械构件中，联轴器可以用来实现相邻两根旋转轴的半永久性联接。

youdao

Such a mismatch hasn't happened since the country was founded, largely because its greatest wars have tended to be brief interludes, not semipermanent features.

WSJ: When the Troops Were Very Young

The trend toward monitors got moving when cardiologist George Klein, of the University of Western Ontario, first approached Medtronic in 1989 with the idea of a semipermanent implant to measure heart rhythms.

FORBES: Magazine Article

With limited capital and the recession looming, she began organizing riotous pop-up shows in semipermanent venues across London and the States, and also in Paris, where Sellers has a second home, an 18th-century apartment in the heart of the Marais that's been transformed into a contemporary haven by Ab Rogers, son of the architect Richard Rogers.

WSJ: Libby Sellers Knows the Art of Design