?圆心板
... 求圆心规center square 圆心板center tack 定心(自由度)centering ...
It is possible that Romney, after tacking to the right during the nomination process, will tack to the center during the presidential race.
FORBES: The GOP: A Party In Flux
And is there hope that President Obama will see the light and tack to the center on economic policy, as did Francois Mitterrand and Bill Clinton?
FORBES: It's The Incentives, Stupid
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。