demonstrative

他在公共场合总是很热情，毫不掩饰对家人的爱。

He's very ___demonstrative in public, openly showing affection to his family.

在句子'我喜欢这些花'中，'这些'是一个指示代词。

In the sentence 'I like ___these flowers,' '___these' is a ___demonstrative pronoun.

老师用生动的例子来清楚地展示这个科学原理。

The teacher used ___demonstrative examples to clearly show the scientific principle.