Using the main coordinate law to study and analysing dynamic response characteristics of resonance type of system, setting up the mathematics model of the resonance type vibration system;

研究与分析了共振式振动系统的动态响应特性，建立了共振式振动系统的数学模型；

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Mouse support has two main USES: coordinate tracking, and zooming.

鼠标支持有两个主要用途：坐标跟踪和缩放。

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The main task of the team leader is to fully coordinate the program on the day, to encourage and support the whole team, to solve problems and evaluate the whole program.

队长的职责主要是全程协调当日项目的运行、支持鼓励整个团队、帮助解决问题并评估整个项目。

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Earlier in the week, police spokesman Lieutenant Schwartz told the BBC they had been preparing for the summit for more than six months and had even held meetings with the main protest groups to coordinate their actions in advance.

BBC: A heavy police presence surrounded the talks

The Director of Tribal Affairs serves as the main point of contact between the Secretary and tribal leaders across the country, working with our intergovernmental partners to coordinate Department-level engagement with tribal elected officials, or their designees, related to key Department policy decisions.

WHITEHOUSE: Resources within U.S. Federal Agencies | The White House