Of course, you can do jumping jacks, crunches and other simple exercises without any equipment at all.

当然，你也可以做杰克跳、仰卧起坐等不需要任何器材的简单锻炼。

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Unlike most other USB modems, the 250U has jacks to connect an external antenna for better reception.

与其他的USB调制解调器不同，250U集成了天线以获得更好的接收效果。

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Rescue crews were using manual jacks, saws and other light equipment fearing heavy equipment could further collapse the tunnel, said Daisy Primayanti, vice president of corporate communications.

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The SIX Series also has the ability to connect with other speakers and devices through 3.5mm audio in and out jacks.

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