Joanna swung back on to the main approach and headed for the airport.

乔安娜把车急转回主干道，向机场开去。

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To enter Class B airspace, such as an approach to a major metropolitan airport, an explicit ATC clearance is required.

需要持有明确的空中交通管制许可才能进入B类空域，如接近一个大都会机场。

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When it is time to land, aircraft usually make a stepped approach to an airport, descending and then maintaining altitude for a while before descending again.

当到了该降落的时候，飞机一般采取分步法降到地面机场，即：先下降，然后维持该纬度一小会儿，再继续下降。

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Visibility was limited, forcing the plane to make a second approach to Almaty airport, the airline said.

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