Poetry transmission and the origin of poetry are synchronous and ancient phenomenon, but the discussion and study of it is a new hot issue.

诗歌传播是与诗的起源同步的、古已有之的现象，但对它的系统研究却是一个比较新的热门话题。

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Fossilization is a common phenomenon in second language acquisition (SLA), which is also the hot issue in foreign language theoretical research.

中介语石化是二语习得的常见现象，也是外语习得理论研究的热门话题之一。

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How to solve the phenomenon of inequity and partiality appeared in the field of sports has become a hot issue in all walks of China.

如何解决体育运动中不公平、不公正现象，已经成为中国各界热烈关注的问题。

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