这个公司承诺免费的，四天之内的送货。

The company promises free, four-day delivery.

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在泰米尔纳德邦前女演员贾亚拉姆•贾亚拉·莉莎用承诺免费大米和其它商品来鼓惑选民投票。

In Tamil Nadu Jayaram Jayalalitha, a former actress, wowed voters with promises of free rice and other goodies.

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提供不麻烦简单免费的使用可高效消除承诺风险。

Offering no-hassle free trials was sufficient to remove the commitment risk.

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