1·The toolkit contains various controls like: datagrids, charts, calendars, menus, trees, tabs, HTML, spell checkers, captcha, explorer bars, scheduling, and others.
该工具集包含了各种控件，如数据表格、图表、日历、菜单、树、标签、HTML、拼写检查器、验证码、浏览工具条、调度器等等。
2·A CAPTCHA is a challenge-response test to determine that the response is not generated by a computer.
—一个验证码是质问-响应的测试以便于确定这个响应是不是被一个计算机产生的。
3·Moreover, you can require to enter a CAPTCHA after a number of failed logins from a certain IP address.
此外，在某一个ip地址多次登陆失败之后你可以要求输入一个验证码。
4·“If the benefit a spammer is getting from obtaining an e-mail account is less than $3 per 1,000, then CAPTCHA is doing a perfect job,” says Dr von Ahn.
von Ahn博士说:“如果一个司盘客获取一个邮箱账号得到的钱少于千分之三美元，那么验证码系统的效果就恰到好处了。”
5·With what amounts to billions of CAPTCHA solutions already processed and billions more to come, Google is breeding the next generation of 'bots that will fool the systems it has just deployed.
随着达十亿验证码解决方案的得到处理，随之而来的将是几十亿，谷歌正在孕育新一代“可以骗过它自己刚刚设置系统的机器人”。