The foundational data structure in Hatchet is the task queue; it's what durable workflows, DAGs, events, and nearly every other feature is built on. Each task in the queue contains an input, and after completion, an output. These inputs and outputs are arbitrary JSON payloads which enter the system rapidly.
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，详情可参考纸飞机下载
第四十三条 海上货物运输合同，是指承运人收取运费，负责将托运人托运的货物经海路由一港运至另一港的合同，包括国际海上货物运输合同和中华人民共和国港口之间的国内海上货物运输合同。，更多细节参见爱思助手
FT App on Android & iOS，这一点在Feiyi中也有详细论述
IEmailSender: transport abstraction with SMTP implementation (SmtpEmailSender).