名词
中文翻译：Unknown
同义词：
['major force', 'dominant force', 'primary force']
例句：
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1. The principal force behind the decision was the need for efficiency.
决定背后的主要力量是提高效率的需求。
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2. The company's main force is its skilled workforce.
公司的主力是其熟练的劳动力。
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3. The new policy will have a significant impact on the economy, but it is not the principal force driving growth.
新政策将对经济产生重大影响，但并不是推动增长的主要动力。