如果许多可伸缩天线附着在微型无线电收音机上面，并且放置于大桥内部，它们就会随着桥相应地伸展或收缩，这样就会经常性的自我调谐。

If lots of flexible antennas attached to small radios were placed inside a bridge, they would expand or contract along with the bridge and so would constantly retune themselves.

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近年来，内部天线几乎完全取代了传统的可伸缩及竹节天线。

In recent years, internal antennas have almost entirely replaced the traditional retractable and stubby antennas.

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近年来，内部天线几乎完全取代了传统的可伸缩及竹节天线。

In recent years, internal antennas have almost entirely replaced the traditional retractable and stubby antennas.

youdao