demonstrated

过去式：

动词过去式: demonstrated

更多词形：

动词过去式: demonstrated | 动词过去分词: demonstrated | 动词现在分词: demonstrating | 动词第三人称单数: demonstrates |

单词例句：

The doctor demonstrated the harmful effects of tobacco.

医生用实例说明烟草的有害的影响。

He demonstrated how to mend a puncture.

他示范如何修补车胎刺孔。

He demonstrated how to use the instrument.

他示范如何使用该仪器。

Thousands demonstrated against the price increases.

数以千计的人举行示威，抗议物价上涨。

She demonstrated that 2 and 2 are four.

她证明2加2等于四。

She demonstrated a new car to customers in the department store.

她在百货公司向顾客示范驾驶一辆新汽车。

I demonstrated conclusively this morning.

今天早上我已经确实证明了。

He demonstrated a mastery of Arabic.

他显示了对阿拉伯语的精通。

The attorney demonstrated that the witness was lying.

那位律师证明证人在撒谎。