rocket science片语KK [ˋrɑkət ˋsaɪəns] /ˈɹɑkət ˈsaɪəns/发音片语1难事、高深的学问、复杂的事口语,多用于否定句Changing a tire isn't rocket science; anyone can learn it.换轮胎并不是什么难事,谁都学得会。2火箭科学、航太科技She left her job in finance to study rocket science.她辞掉金融业的工作,去研究火箭科学。用这个字练口说→