若按研发投入规模，将企业划分为千亿、百亿、十亿、亿及千万元等不同区间，我们发现研发资源的集中趋势尤为显著，头部企业在创新活动中发挥引领作用。
Innovations in recent years to make testing methods more sophisticated include thermal imaging, light analysis using lasers, and DNA profiling.
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One study often cited is by Canadian psychologists Donald Dutton and Susan Painter. In research published in 1993 while they were at the University of British Columbia, they followed 75 women after they had left abusive partners.
But in 2022 summer sea ice in much of Antarctica dramatically shrank, falling from an average of 2.8m sq km to a record low of 1.79m sq km in 2023.
幼儿园的轮滑课十一放假前，幼儿园举办了一次亲子活动，第一次带着孩子跟其他小朋友一起出去玩，也在这个过程中跟老师聊了聊，说孩子很听话，能听懂老师的指令，对谁都笑嘻嘻的，老师都很喜欢她。