关于庆祝100周年的英语句子，可根据具体场景选择适用的表达。以下为综合整理：

一、通用庆祝类

1. "Today we celebrate the 100th anniversary of our great achievements, uniting people through shared history and aspirations."（今天我们庆祝百年成就，以共同历史和愿景凝聚人心。）

2. "On this 100th milestone, we reflect on the journey of progress and look forward to future unity in diversity."（在这个百年节点，我们回顾发展历程，并展望在多元中团结前行的未来。）

3. "A century of dedication has shaped our world, and we stand united in celebrating the milestones of knowledge and innovation."（百年的奉献塑造了我们的世界，我们因知识与创新的里程碑而团结一致。）

二、教育意义类

1. "Education is the most powerful weapon which you can use to change the world. Let's celebrate 100 years of learning and empowerment."（教育是改变世界的最有力武器，让我们庆祝百年学习与赋权历程。）

2. "Through the power of education, we bridge gaps and foster understanding. Here's to 100 years of shaping minds for a better world."（凭借教育力量，我们架起沟通桥梁并培育理解。在此向百年塑造心灵的历程致敬。）

3. "Learning is a lifelong journey. Today, we honor 100 years of scholarship that has empowered generations."（学习是终身的追求。今天，我们纪念百年学术传统对世代的赋能。）

三、历史意义类

1. "This century has witnessed remarkable achievements that redefine our collective memory and future direction."（这一百年见证了重塑集体记忆与未来方向的卓越成就。）

2. "We celebrate 100 years not just of time, but of the indelible impact on society and culture."（我们庆祝的不仅是百年时光，更是对社会与文化产生的不可磨灭影响。）

3. "In commemorating 100 years, we honor the pioneers who shaped our world and the legacy of their vision."（在百年庆典中，我们缅怀塑造世界的先驱及其愿景的传承。）

四、特定事件类（如建党百年）

1. "On the 100th anniversary of the founding of the Party, we reflect on the journey of the CPC and its role in shaping modern China."（在建党百年庆典中，我们回顾中国共产党的历程及其对现代中国的塑造作用。）

2. "This century, the Party has been the beacon of hope, uniting people in pursuit of national rejuvenation."（这一百年，党始终是希望的灯塔，引领人民追求民族复兴。）

3. "Celebrating 100 years means embracing the past while forging a path to the future with renewed commitment."（百年庆典意味着既要铭记历史，又要以新的承诺开创未来。）

建议根据具体庆祝主题选择表达，如教育成就、历史节点或社会影响等，并结合实际场景调整措辞。