Their websites contain a wealth of information on the topic.

他们的网站上有大量与该主题相关的信息。

《柯林斯英汉双解大词典》

He spoke with authority on the topic.

他就这个课题发表权威意见。

《牛津词典》

You cannot determine the effect of MXTOPIC profiles on topic security just by reviewing the profiles themselves.

不能仅通过检查配置文件本身就确定MXTOPIC配置文件对主题安全性的作用。

youdao

Fox co-manages the blog DC Moms Like Me.com When a post on the topic went up on the site, Fox says other moms had a similar reaction.

VOA: standard.2009.12.18

It's morality--It bears on morality because it bears on-- So, the question is, "How does group membership, how does that relate to the topic of morality?"

群体会影响道德-,其实问题就是”隶属于一个群体，跟道德这个话题有什么关系？“

耶鲁公开课 - 心理学导论课程节选

Now of course, nutrition is the kind of subject that one could spend the whole semester on, could spend--do multiple classes on, because it's a very interesting, fascinating, and complex topic.

当然,要学习营养学这门课程,可能需要整个学期的时间,耗费很多课时,因为这个话题十分有趣,且吸引人,而又一言难尽

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

Sure enough, nearly all reputable FORUMS have moderators to ensure that things stay orderly and relatively on-topic.

FORBES: Yahoo! Is Fostering A Cauldron Of Hate and Anarchy

There were a number of moments where it would have been appropriate and on-topic to bring it up and the President chose to go in another direction.

FORBES: A Narrow Win For Romney

One new force on the block, Appinions, provides contextual analysis, focusing more on topic-based comparisons, and less on creating an individual score.

FORBES: The Democratization of Social Influence