There is an example of the tortuous nature of the supply chain system in a study of the Apple iPhone by the Asian Development Bank Institute.
亚洲开发银行研究所(Asian Development Bank Institute)对苹果公司(Apple)产品iPhone的一项研究中有一个例子，可以说明供应链体系错综复杂的特征。
The regular education of library science in China has a history of 76 years since 1920. Though its development was tortuous with stagnation for some time, it is now flourishing and modernized.
自1920年至今，我国图书馆学正规教育走过了76年的历史，其间创立了情报学和信息管理学。
The regular education of library science in China has a history of 76 years since 1920. Though its development was tortuous with stagnation for some time, it is now flourishing and modernized.
自1920年至今，我国图书馆学正规教育走过了76年的历史，其间创立了情报学和信息管理学。
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