记住，在根据计时(尽量进行良好实践)输入用户名时，可能要进行多次尝试来输入用户名，以便可以精确地匹配预期的值。
Keep in mind that as you enter your user name according to your (hopefully well-practiced) timings, it make take a few tries to enter your user name with enough precision to match the expected values.
软件重用并不是一个新概念，多年来各种组织对此进行了很多次尝试，取得了不同程度的成功。
Software reuse is not new, and has typically been attempted many times over the years with varying degrees of success by development organizations.
无论如何，我是如此的满足，几乎是如释重负的，当我发现他真的打了一杆，并且决定在学习期间进行更多次尝试。
Anyways, I was so content, almost relieved, when I found out he actually gave it a shot, and decided to give it a few more on the learning sessions.
目前，进行过40多次探索火星的尝试，但是半数以上的尝试都失败了。
So far there have been over 40 attempts to explore Mars but more than half of them have failed.
已经进行了很多次的尝试，使用多种技术来实现混合系统。
Many attempts have been made to realise a hybrid system using multiple techniques.
尽管黑客们进行了多次尝试，但是攻击还是没有成功，无法获得进入网站上受限制信息储存区域的权限。
The attack was unsuccessful and, despite their attempts, the hackers were unable to gain access to restricted information stored on the website.
尽管黑客们进行了多次尝试，但是攻击还是没有成功，无法获得进入网站上受限制信息储存区域的权限。
The attack was unsuccessful and, despite their attempts, the hackers were unable to gain access to restricted information stored on the website.
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