To go or come down from a higher to a lower position.

下降。

To come or fall violently or in force.

猛降；突袭。

To pass by inheritance.

遗传。

To pass by transmission.

传送。

To pass in discussion from is logically prior or more comprehensive.

进入讨论(由一般性转入具体细节)。

To go down or along.

下降；沿...而下。

To derive descent from, have an ancestor.

为...的后裔。