词汇	polar singularities
释义	polar singularities 极点奇异性
随便看	maintain order Maintain or Maintenance maintainors maintain our cultural diversity maintain our political orientation maintain our position with buyers maintain out of maintain peace maintain peace and order maintain peace and security maintain personally maintain place Maintain plan imputed cost calc maintain position maintain pressure maintain price Maintain Production Schedules maintain progressively Maintain Project New Key Assignment maintain proper air purity Maintain pruchase information in MIS maintain public highways maintain public order maintain quietly maintain railways