“migration rate”造句，怎麼用migration rate造句

Analysis of migration rate models for biogeography-based optimization

In 2008 the domestic migration rate was just under 12%, and the rate of migration between states fell to 1.6%-less than half the level that prevailed in the post-war decades.

Between 2000 and 2001, in contrast, the migration rate fell from over 15% to under 14%.

First, in the paper the migration rate is amended on the basis of the statistical distribution and the better transient response models are put forward.