I've heard: " cows" , I've heard " ka-os" , but the actual correct way is " k" , we pronounce the " a" as a diphthong, as like a two-vowel sound, " ke yos" or " key os" .
我听过:“cows” ,我听过“ka-os” ,但实际正确的读法是“k” ,我们把“a” 发成双元音,就像双元音一样, “ke yos” ” 或“关键操作系统” 。