演讲者着重强调了团队合作在项目中的关键作用。

The speaker ___emphasised the crucial role of teamwork in the project.

老师在课堂上重点强调了考试的关键知识点。

The teacher ___emphasised the key points for the exam during the class.

老师强调了第二个音节，以便学生正确发音。

The teacher ___emphasised the second syllable to help students pronounce it correctly.