Since you can "t do this on the client side it is necessary to validate on the server."
由于无法在客户端完成这一任务,因此在服务器上进行验证是有必要的。
With multimedia, you don 't have to be a passive recipient. You can control. You can interact. You can make it do what you want it to do.
对于多媒体,你不再是一个被动的观众,你可以控制,可以交互作用,可以让它按你的需要去做。
But it can rob you of your self-confidence if you don "t do it."
但是,如果不这样做,就会剥夺你的自信心。
And one day you want to go to the cemetery or something, you can't do it because you don't know where they are.
VOA: special.2010.02.01
I can't go down to the registrar and say, you know, I'd really like to do it at another time.
我不能去和登记的人说,我想要换个时间。
Now, this is a large class, and if you don't do anything about it, it can be very anonymous.
这是一门大班课程,如果你并不打算和周围人相互介绍的话,也就不会有什么人能够认识你了
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