The 165-meter Expo Thermometer, the highest meteorological signal tower in the world, is located in the Puxi Expo Park along the Huangpu River.

这根世界上最高的温度计高达165米，矗立在黄浦江畔的浦西世博园中。

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In the firstone. black clouds of exhaust fume are emitted from a highchimney. to thes trend one. a signal tower stands instead ofthe ugly chimney. sending out invisible harmful radiation.

第二幅图中一座信号塔取代了丑陋的烟囱。放射出无形的有害辐射。

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She apparently doesn't give Donald the signal to follow, because he stays at his tower and calls and calls again, his pitch rising ever higher.

很显然，她没有示意唐纳德追过来；他留在自己的塔楼里，一遍又一遍地歌唱，声调越来越高。

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On channel boosters quickly receive the OTA signal from the main tower and retransmit the signal on the same frequency.

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Other booster enhancements that have been proposed to the FCC include proximity detection to prevent cell tower signal overload and bi-directional signal amplification, which would improve signal transmissions from cellphones back to cell towers.

FORBES: FCC Decision On Cellular Signal Boosters Imminent

Femtocells are provided by operators to provide a signal indoors in remote areas where the cell tower may be too far to transmit a signal inside the home.

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