He underlined the key words while listening to the lecture.

他边听讲座边在关键词下划线。

同一单元的其他句子

• The core of effective listening is focusing on the main idea.有效听力训练的核心是关注主旨。
• Can you catch the key details from the dialogue?你能从对话中捕捉到关键细节吗？
• Do not interrupt the speaker while they are talking.当说话者发言时，不要打断他们。
• Listening for specific information requires careful attention.听取特定信息需要仔细注意。
• The professor emphasized the importance of active listening.教授强调了主动听力的重要性。