慢速英语:Can You Wrap Your Words Around These Tongue-Twisters?

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1. improve vt.提高（土地、地产）的价值; （机会） 利用; 改善
例句：The city must improve its public transport.
该城必须改善其公共交通系统。

2. struggle n.奋斗; 打斗; 竞争
例句：The fine tradition of hard struggle should be carried on.
艰苦奋斗的优良传统应当发扬。

3. realize vt.实现; 了解，意识到;
例句：I do not realize that offends him.
我没有意识到已经冒犯他了。

4. explain vt.讲解，解释
例句：She sent him letter after letter to explain the delay.
她一封接一封地给他寄信解释推迟的原因。

5. participate vi.参加某事; 分享某事
例句：That boy insists to participate in people's the Liberation Army.
那个男孩坚持要参加人民解放军。