n. (pl. ～ /-siː/ or ~s) ①(in a system of coordinates) the shortest distance from a point to the vertical or y-axis， measured parallel to the horizontal or x-axis; the Cartesian x-coordinate of a point 〈数〉横坐标 ②the part of a line between a fixed point on it and an ordinate drawn to it from any other point 横轴 ...... （共318字） [阅读本文]>>
高阶英汉双解adj. ①not present (at sth.);at another place 缺席的，不在场的：～ friends不在场的朋友 ②not existing;lack 缺乏的，不存在的：Sn
■n. /eI/(pl.A's or a's) ①the first letter of the alphabet 英语字母表中的第1个字母 ②the sixth note of the diato
n. a main British road that goes from London to Edinburgh A1公路
n. ①a standard European size of paper， 420×297mm 欧洲标准的纸张规格 ②paper of this size 此种规格的纸张
n. a standard size of paper in the EU(European Union)， which is 21 centimetres by 29.7 centimetres A
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