/hɜ:ts ||; hɝts/abbr hertz; (used in radio) a measure of FREQUENCY 赫（兹）（用于无线电，频率单位）
*I²
/aɪ ||; aɪ/pronoun (the subject of a verb) the person who is speaking or writing （作动词的主语）我: I phoned and said that I was busy.我打过电话说我没有空。I'm not going to fall, am I?我不会掉下去的，对吗？