For example, ls -t will sort by modification time (newest to oldest) while ls -ls will produce a long listing sorted by size (largest to smallest).
例如，ls- t将按照修改时间排序(从最新到最旧)，而ls -ls将生成一个按大小排序的长列表(从最大到最小)。
New T-Mobile customers can purchase an HTC HD7 for $49.99 with a two-year contract, while existing customers can upgrade for $99.99.
新的T-Mobile用户可以以49.99美元的购买一部HTCHD 7但需要签订两年合约，已在网的用户可以以99.99美元的价格升级自己的设备。
If you "re looking for a job while you have one, you probably don" t want to use your boss or a current colleague as a reference.
如果你在有工作的时候求职的话，你可能不会想要你的上司或同事帮你写推荐信。
Won 't you excuse me for a little while?
请允许我离开一会儿好吗？
I began the day playing tennis with a secondary school friend I hadn t seen for a while.
那天早上我与一个很久未见面的中学同学打网球。
As we know, a large amount of labor and material resources should be invested in the development of software, while it is very easy to reproduce the software for the expertise isn 't used.
众所周知，软件的开发需要投入大量的人力物力，但是复制软件却不需要什么专门技术，非常容易。
As we know, a large amount of labor and material resources should be invested in the development of software, while it is very easy to reproduce the software for the expertise isn 't used.
众所周知，软件的开发需要投入大量的人力物力，但是复制软件却不需要什么专门技术，非常容易。
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