At the same time, do not open the back cover, so as to avoid dust, fiber, water vapor and other invasive table machine, affecting the normal travel time.

同时，不要随便打开手表后盖，以免灰尘、纤维、水汽等侵入表机，影响手表的正常走时。

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And the prospect of a return to normal air travel remains far from clear.

BBC: EU emergency talks called on volcanic ash air chaos

"They will go beyond the normal ban on air travel within a three nautical-mile radius.. and up to 3, 000 feet above ground, " Shumann said.

CNN: FAA issues flight restrictions

By definition, we tend to travel the normal commuter hours.

BBC: NEWS | UK | Magazine | Alone with the yobs