| 例句 |
Dolphins produce a high frequency sound.海豚发出的声音频率很高。We are concerned at the high frequency of racial attacks in the district.我们关心的是这个地区高频率的种族攻击。The high frequency of cases of diarrhoea is attributable to poor food hygiene.腹泻病例频繁出现是因为食物不卫生。You can't hear waves of such a high frequency.你无法听到如此高频的声波。A high frequency of the disease is found among the refugees.难民中这种病的发病率很高。 |