At the vortex center zone, the tangential velocity was less than the axial velocity.

涡心附近的切向速度小于轴向速度。

youdao

Authorities are taking no chances. Although they have announced there will be no red zone, an alcohol ban will come into force starting Tuesday in the center of Rome and the area surrounding the stadium.

VOA: standard.2009.05.26

Defenseman Dmitry Kulikov sent a pass off the sideboards in his zone into center ice.

WSJ: Zajac sets up 2, Brodeur has 17 saves for Devils

But as the heat rose and the winds increased, they had to give up and move to the very center of the safety zone.

NPR: Ex-Firefighter Relives Yellowstone's 'Black Saturday'

Right after the neighborhood tour, we helped to cut the ribbon at the grand opening of the Green Impact Zone Community Assistance Center.

WHITEHOUSE: Our Top Stories