For example, "Public speaking is an important topic in today's business world."

举个例子，介绍词可以像这样写：“在当下的商业世界里，公众演讲是一个至关重要的课题。”

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You can exchange the favor, helping them explore an important topic in their life.

接下来你们可以交换角色，帮助他们探寻一个他们生活中的重要问题。

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The research of the structure of protein has become an important topic in bioinformatics.

蛋白质结构的研究已经成为了生物信息学中的一个重要课题。

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Sex differences in ASD is an important topic, but one that has only recently become the focus of attention.

CNN: How girls and boys differ when it comes to autism

It is a pity that an important topic like contemporary food mores, which deserves serious study, is treated so rhetorically.

WSJ: Bruce Palling on Food: Taking a Bite Out of Foodie Culture

Truthfully, it is an important topic as many of you are anxious to buy ether HD DVD or Blu-ray but can't decide on a format.

ENGADGET: High-def format war might not be won in living rooms HD