genetic changedʒiˈnetiktʃeindʒ短语¹⁸⁰⁰⁹⁸⁺¹ 基本例句 遗传改变 Over time, an avian virus may gather enough genetic change to spread easily, as experts believe was the case with the1918 Spanish flu, an event that killed at least30 million people worldwide. 随着时间的推移，发生足够的变异后的禽流感病毒广泛传播，就像1918年发生的那场夺去了至少3千万人生命的西班牙流感那样。 dxy