Practice makes perfect, but many presenters don’t practice properly.

多练习才能臻于完美，但许多主讲人并没有好好练习。

Weather presenters should not wear jeans.

气象主持人不应该传牛仔裤。

So, do good presenters have to be entertainers?

因此,作好的演讲者不必像“娱乐主持人”？

Each week presenters would put the case for their favourite candidate.

每个星期主持人推出他们最喜欢的候选人。

It's also easy to switch screens and turn viewers into presenters.

而且用户能轻松切换屏幕，并将观众转变成演示者。

Many presenters watch their presentation rather than their audience.

许多演讲者看他们的演示文稿而不是听众。