Short-wave radio uses the 20-50 metre band.
短波收音機用的波段是20–50米。
He greeted them with a wave and a broad smile.
他咧嘴笑著揮手和他們打招呼。
The nation had been buffeted by a wave of strikes.
罷工浪潮使這個國家受到了重創。
She was apt to raise her voice and wave her hands about.
她常常提高嗓門并揮舞雙手。
A wave of superstitious fear spread among the townspeople.
一股迷信的恐懼浪潮在城里人中蔓延。