One important challenge with storage technology to note is that while storage capabilities of disk are increasing dramatically, the rotational speed of the disk increases at a much slower pace.

关于存储技术需要注意的一项重要挑战是，尽管磁盘存储功能得到了极大的改进，但是磁盘的旋转速度却没有太大的提高。

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Analysts note that a number of companies have tried to challenge PayPal but none have made much progress.

分析人士指出，许多公司都试图挑战PayPal，但都没有取得很大进展。

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Fans of the legal challenge to Obamacare take note: The core constitutional argument behind the litigation might be in trouble if it ever hits the Supreme Court.

FORBES: Supreme Court Dissent Might Spell Trouble For Obamacare Suits

But Liberal Democrat MP Sir Alan Beith asked Mrs Miller to take note that "many" churches had a "genuine" fear of legal challenge, even if it is unsuccessful.

BBC: Government extends marriage to same-sex couples

Wilson disregarded the note but the split between Benn and Healey continued - Benn's challenge to Healey's deputy leadership of the Labour Party only just failed in 1981.

BBC: NEWS | UK | UK Politics | 1975 economic fears are laid bare