1. She was very demonstrative in her affection, always hugging and kissing her friends.
她在表达感情方面非常热情，总是拥抱和亲吻她的朋友。

2. The teacher used a demonstrative example to help the students understand the concept better.
老师用一个示范例子帮助学生更好地理解这个概念。

3. His demonstrative gestures made it clear that he was upset.
他的示意动作清楚地表明他很生气。

4. The speaker was very demonstrative in his presentation, using hand gestures and facial expressions to emphasize his points.
演讲者在演讲中非常生动，使用手势和面部表情来强调他的观点。

5. The demonstrative pronouns "this" and "that" help to indicate specific objects or people.
指示代词“this”和“that”有助于指示特定的物体或人。

6. She was not a demonstrative person, preferring to show her love through small acts of kindness.
她不是一个喜欢表达感情的人，更喜欢通过小小的善意行为来表达她的爱。