four-center approximate method 四心近似法 ; 四圆心近似法
four center polymerization 四中心聚合
four-center construction 四心椭圆法
four-center transition state 四中心过渡状态 ; 四中心过滤状态
four-center spiral 四心螺线
four-center reaction 四中心反应
four-center-type reaction 四中心型反应
Design method of ellipse shoulder forming device was simplified with four-center method.
主要利用椭圆的“四心法”简化了椭圆管翻领成型器的设计方法。
When Winston is four years old, the foster family must return it to the training center.
温斯顿四岁的时候，寄养家庭必须把它送回培训中心。
Supplies began running low and early this week, five set off on foot across snow fields; on Friday, after four days of trudging, they reached a working military radio center.
供应开始减少，本周早些时候，五个人徒步穿越雪地；周五，经过四天的跋涉，他们到达了一个正在工作的军事无线电中心。
But in two thousand four the Center for Rural Development had the idea for a bank to help self-employed workers buy their own rickshaws.
VOA: special.2009.05.11
The center's distance learning program uses puppets to teach children in classrooms in forty-four American states.
VOA: special.2009.09.23
More than twelve million people passed the statue between eighteen ninety-two and nineteen fifty-four on their way to the immigration center on nearby Ellis Island.
VOA: special.2009.06.29
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