本文在传统活套控制研究的基础上，建立了活套支持器的多变量数学模型，并讨论了活套多变量系统控制方法。

In this paper, a new multivariable dynamics model of loop bearer is given based on the study of conventional loop control.

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这台数字音频播放器支持多种格式。

This digital audio player supports multiple formats.

《牛津词典》

学生飞行员和支持潜水员必须得到水中呼吸器认证书才能比赛。

Student pilots and support divers must become scuba certified in order to compete.

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