AD
/ 9eI 5di:; 9e `di abbr 缩写 = in the year of Our Lord; of the Christian era (Latin anno domini) 公元（源自拉 丁文anno domini）
in (the year) 955 A5D/,AD 5`5, 公元55年. Cf 参看 BC 1.
ad / æd; æd/ n (infml 口) =advertisement (advertise)
put an ad in the local paper 在本地报纸上刊登广告.