动词短语
中文翻译：开始链式反应
同义词：
['start', 'initiate', 'commence例句：1. The scientist began the chain reaction in his lab.（科学家在他的实验室里开始了链式反应。）2. The project began with a small team of engineers.（这个项目由一小队工程师开始。）3. The company began to expand its operations across the country.（这家公司开始在全国范围内扩展其业务。）']
例句：
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1. The scientist began the chain reaction in his lab.
科学家在他的实验室里开始了链式反应。
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2. The project began with a small team of engineers.
这个项目由一小队工程师开始。
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3. The company began to expand its operations across the country.
这家公司开始在全国范围内扩展其业务。