These services aren't truly free; you pay for the songs when you purchase a new cell phone, or for signing a contract for broadband intern.

但这些服务并非名副其实地“免费”，因为在购买新手机的时候，你同时也就为歌曲或者签署的宽带服务协议掏了腰包。

youdao

New T-Mobile customers can purchase an HTC HD7 for $49.99 with a two-year contract, while existing customers can upgrade for $99.99.

新的T-Mobile用户可以以49.99美元的购买一部HTC HD 7但需要签订两年合约，已在网的用户可以以99.99美元的价格升级自己的设备。

youdao

Thank you for your letter of 20 May requesting earlier delivery of goods under your purchase contract no. 954.

五月二十日要求提早装运第954号合约的来信收到。

youdao

Notwithstanding ss. 196.49 and 196.80, no approval or certification of the public service commission is necessary for a public utility to purchase, or contract for the operation of, such a plant, and any such purchase is considered to be in the public interest and to comply with the criteria for certification of a project under s. 196.49 (3) (b).

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The Moghadams, whose purchase contract for extras covered 32 pages, paid for 50% of their upgrades upfront, though that was spread across multiple payments.

WSJ: That'll Be Extra

In early June Oman signed a contract with Lockheed Martin for the purchase of a C-130 Super Hercules plane, which will join the three C-130Hs that were purchased in the early 1980s.

ECONOMIST: Oman preserves friendly ties with both Iran and the West