input = input[:index-1] + input[index:]
Relatively few firms today can manufacture actuators at scale with a high level of precision, and these components are still a long way from the incredibly engineered muscles that allow animals to move with such grace and efficiency.，这一点在新收录的资料中也有详细论述
。新收录的资料对此有专业解读
重点领域政策联动落地。《京津冀美丽中国先行区建设行动方案》《加快推动通武廊交界重点区域产业创新发展实施方案》印发，为区域生态协同治理、产业融合提供坚实政策支撑。，更多细节参见新收录的资料
and the "no work email please": ^(?!info@|help@|sales@). These would not match because negative look-aheads are unsupported in Ostrich since they are complicated to implement for a constraint solver. They can be rewritten in some cases, but nobody's bothered because that's one of the many, many things that "aren't research".