We did a demonstration there with two vibrating objects with a spring, but yet the center of mass was moving with a constant velocity.

我们做过演示的，弹簧连接两个振动物体，但是质量重心，却保持稳定速度。

youdao

You can either copy them form your Spring Framework installation or download it from the Velocity site.

您既可以从Spring框架安装中复制，也可以从Velocity站点下载。

youdao

The use of JSPs, Tiles, Velocity, and PDF export in this tutorial is designed to demonstrate how the Spring MVC API makes this possible.

本教程中使用 JSP、Tile、Velocity 和 PDF 导出功能的目的在于演示 Spring MVC API 如何使这一切成为可能。

youdao

Pineda arrived with hopes of being a second ace behind CC Sabathia, but from the start of spring, his velocity was down, prompting concern from the Yankees and outsiders.

WSJ: Pineda Done Before Starting

The momentum of the Arab Spring is still gaining velocity, from Libya to Syria, but the U.S. and Israel are about to miss another historic opportunity.

FORBES: Why Israel and the U.S. Should Support Palestine at the U.N.