to be of no use的意思|示意

The service is free, offers unlimited disk space, and requires no sign-up to use any of the site's features. The files you upload, however, can only be up to 100MB in size.

服务是免费的，空间无限制，不必注册，但单个文件不能超过100M。

In that way, a WPAR would be able to use all of system's physical memory if there was no contention for memory.

这样的话，如果没有内存争用，一个WPAR可以使用系统的所有物理内存。

The days of drawers full of chargers for mobile phones you no longer use could soon be over after manufacturers agreed to use a universal model.

当制造商们同意使用统一充电器的标准后，抽屉里装满了你不再使用的充电器的日子可能很快就一去不复返了。

There is no simple way to do this in Tapestry. One option might be the use of the client-side persistence, but this is a rather long story that deserves some special consideration.

Tapestry中没有什么简单的方法实现上述功能，应用客户端持久性是一种选择，但这是一个很难处理的问题，需要进行一些特殊的考虑。

No country had to follow these risks, but generally, countries have followed them because they want to be part of the international community and you want to use the standards that were recommended.

没有哪个国家必须遵守这些约定，但基本上，所有国家都会遵守，因为他们想成为国际社会的一份子，而且也希望能够使用里面推荐的准则。

In other words, watching that video would be of no use to you.

换句话说，看完这部视频对你没什么用处。