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。
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。
Note: the control of the cursor has been an interesting challenge on this project.
注意: 光标的控制已经是在这一个计画方面的有趣挑战。
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