Nye has performed a valuable service in rounding up and summarizing the various academic studies and theories of leadership into a single, slim volume.
在收集各种关于领导力的学术研究和理论、并将它们总结为一本薄薄的书这件事上，奈做出了宝贵的贡献。
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Here, a service provider may charge by volume of transactions or maybe the volume of requesting "components" (seats) within the service requestor.