对于可靠的、基于浏览器的部署，4gl应该支持所有现代浏览器而无需插件或专有技术。

For robust browser-based deployments, a 4gl should support all modern browsers without plug-ins or proprietary technologies.

youdao

该技术完全在物理层自动完成，无需上层协议的支持，具有快速切换和业务恢复时间短等优点。

This technology auto accomplished in physical layer, no need upper protocol layer support, has the strongpoint of fast switching and short application resume time.

youdao