1.antiquty n.古代 (ancient times)；古物（relics or monuments of ancient times)
例:Rome under Augustus and fifth-century Athens provide the most obvious examples in antiquity.
2.antitrust a.反托拉斯的，反垄断的(opposing or intended to regulate business monopolies, such as trusts on cartels)
词根记忆：anti(反对)+trust(联合企业，托拉斯)--反托拉斯的
例:antitrust laws反垄断法
3.aperiodic a.不定期的，非周期性的( of irregular occurrence)
词根记忆：a（不）+period(周期)+ic--不定期的，非周期性的
例:The work of mathematician Roger Penrose in the early 1970s, on the geometry of what are called aperiodic tiles, turned out to describe the architecture of a previously unknown class of crystals.
同根词：periodic(a.周期的;定期的)
4.apex n.顶点，最高点(peak; vertex)
例:The hangar is 103 feet high at the apex of its roof.
5.apiece ad.每个，每人，各(for each one, individually)
联想记忆：a+piece(片)_每人一片--每个，每人
例:Elena purchased brand×pens for $4.00 aprbce and brand Y pens for $2.80 apiece.
6.apparatus n.仪器;设备(device, equipment)
例:No apparatus can detect nerrtrinos unless it is extremely massive.
7.apparel n.衣服，服根clothing．garments）
联想记忆：appar(出现)+el--穿出来的东西--衣服