Language Point 4

They didn't have to talk about it — they demonstrated this truth by their life style. (Para. 1)

Meaning: My grandparents didn't have to explain the saying; their life style just proved how true the saying is.

demonstrate: vt. 1. show clearly

The teacher demonstrated how to make the experiment.

老師演示了如何做這個實驗。

The company demonstrated its new solar power system before a large audience.

公司在一大群觀眾面前演示了新的太陽能系統。

The amount of sickness in this district demonstrates that the water pollution levels are too high.

這地區疾病之多說明這里水污染太嚴重了。

When "demonstrate" is used in the sense of taking part in a march, it is an intransitive verb.

vi. 2. take part in a march or meeting to protest or to make demands

An angry crowd demonstrated in front of the mayor's office for more protection of the environment.

一群憤怒的人群在市長辦公室前示威，要求加大環境保護的力度。

A large group of people were demonstrating in front of the factory, which had polluted the river.

一大群人在工廠門口抗議該廠污染了河流。