time.sleep(2 ** attempt) # 指数退避
Is it possible for Blockchain to be hacked?Yes, blockchain can be theoretically hacked, but it is a complicated task to be achieved. A network of users constantly reviews it, which makes hacking the blockchain difficult.
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Ac we nawight freo ne sindon, for-thy-the we næfer ne mighton fram Wulfesfleote yewitan, nefne we thone Laford finden and hine ofslean. Se Hlaford hæfth thisne stede mid searocræftum yebunden, thæt nan man ne mæy hine forlætan. We sindon her swa fuglas on nette, swa fixas on were.
Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04