The immediate worry is that Spain and Italy are now borrowing money at unsustainable rates and may be forced into the kind of slow-motion default on sovereign loans that is happening in Greece.
Air is forced up from the buoy counterweight tube during downward motion causing the balls to seal the air ports in the valve, thus forcing the air to flow into the whistle.
空气在向下运动过程中受到浮标向上的推力，使阀球将阀门里的气舱密封住，这样迫使气流进入雾笛。
3
The analysis shows that the forced atmospheric motion depends not only on the direction of the basic flow which crosses over the mountain, but the latitudes and scale of the mountain as well.