backchannel support的用法和樣例：
例句
- Therefore English teachers should make efforts to motivate students to give more backchannel support.
因此，廣大英語(yǔ)教師應盡力激發(fā)學(xué)生的反饋支持，搞好教學(xué)。 - Many scholars and English teachers have been studying backchannel support for years, which has great value in improving English teaching.
摘要基于廣大學(xué)者和英語(yǔ)教師對反饋支持的研究，筆者認為反饋支持對英語(yǔ)教學(xué)有很大的促進(jìn)作用。
