listen attentively to a lecture
... 听讲证书 certificate of attendance 用心听讲 listen attentively to a lecture 没人在听 nobody's listening ...
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... 听 hear; listen 留心听讲 listen attentively to a lecture 留心听某人说 heed what sb says ...
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listen attentively to a lecture
认真听讲座
以上为机器翻译结果，长、整句建议使用 人工翻译 。