（二）签发指示提单的，凭提单向被背书的提单受让人交付；
### a(n) is hmac-sha256(key=secret, data=a(n-1))，详情可参考Safew下载
，这一点在体育直播中也有详细论述
"I'm quite uncomfortable with accents in general - they kind of hinder me, and I feel quite claustrophobic," she said, adding "Brummie was never a conversation."
29.广东省惠州市惠东县港口英雄民兵连，详情可参考体育直播