In the U.S., which is probably one of the most restrictive of all mobile markets, Google has managed to sign up two of the top four wireless operators, Sprint Nextel and T-Mobile USA.

在美国，这个最受限制的市场上，Google已经设法使最大的四家无线运营商中的两家——Sprint Nextel和t - Mobile美国加入进来。

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It also has constructors for each of those types and operators for addition, subtraction, multiplication, sign inversion, and taxes.

它包含了对这些类型和加，减，乘，每个经营者签订施工反演，税收。

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In particular, consumers could sign up with operators in foreign countries to take advantage of lower prices.

ECONOMIST: The EU hopes to slash the price of cross-border mobile calls

To sign up cable operators and undercut the perception that the new channel would appeal only to blacks, Johnson shed the original name--Black Entertainment Television--calling it simply BET.

FORBES: The cable capitalist

Without a legal framework, telecoms operators find it hard to sign deals with payment services.

ECONOMIST: Online payments