The information content and the covered region of digital libraries are unprecedented.

数字图书馆信息含量之大，覆盖地域之广是前所未有的。

youdao

This platform can simulate the ray tracing for a fixed frequency or sweeping frequencies, also can calculate the group path and the covered region of rays.

该平台可实现定频或扫频射线轨迹演示，计算各射线群路径，覆盖区域等功能。

youdao

youdao

Almost 84 percent of U.S. trade within the region is covered by Free Trade Agreements.

WHITEHOUSE: Secretary Bryson Promotes American Businesses Across the Americas at White House Conference | The White House

Today, the region is covered in reminders of French gratitude: statues of General Eisenhower, American flags fluttering outside hotels, memorials to soldiers.

ECONOMIST: France, America and D-Day: Norman conquest | The

Only 17 % of the region is covered by forest.

UNESCO: Natural Sciences