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1·Short-wave radio uses the 20-50 metre band.

短波收音机用的波段是20–50米。《牛津词典》

2·Highest is the dramatic, wind-buffeted summit of the 1, 424-metre Grand Ballon, reached by a short trail from the D431 road.

最高点是1424米高“大气球”的引人注目的被风吹动的峰顶，可以通过一条连接到D431公路的短径到达。