First they visited the Vistors' Center.

首先，他们参加了游客中心。

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Vistors came in flocks to see the new bridge.

参观者成群结队地来观看这座新桥。

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Vistors came in flocks to see the new bridge.

参观者三五成群地来观看这座新桥。

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Vistors came in flocks to see the new bridge.

参观者三五成群地来观看这座新桥。

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