（六）运输单证，是指提单、海运单以及其他证明海上货物运输合同和货物已经由承运人接收或者装船的单证。
need to shut down, and the factories that turned their pellets into
。新收录的资料是该领域的重要参考
Are we assuming we can compress their representation at all, i.e. is compressiong from float64 to float32 tolerable wrt to accuracy?，详情可参考新收录的资料
repo_root.to_str().unwrap(),，这一点在新收录的资料中也有详细论述