But, sadly, it is an all-too-rare event and there are only so many other feature documentaries that these successes can then subsidise.
然而令人感到惋惜的是,这实在是一件小概率事件;有许许多多其它的专题纪录片还需要票房来弥补拍摄的资金。
However, it's important to point out that many other message exchange patterns require this feature and it was the desire to support these as well that drove the TC to adopt such a broad solution.
不过,需要指出的是,很多其他消息交换模式需要使用此功能,而TC当初采用这样宽泛的解决方案的目的就是为了支持这些消息交换模式。
In many cases, this feature can be created, with varying degrees of difficulty, by creating custom controls or containers of controls or by other custom programming.
在很多情况中,这种特性都可以通过创建定制控件或控件容器或利用其他定制编程来实现,不过实现的难度会有所不同。
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