grade，rank，order and degree，social estate，grading ；
[例句] 他们建造新楼房来提高土地的等级. They upgraded the land by improving it with new buildings.
[例句] 我们根据阅读能力将学生划分等级. We grade the students according to their reading ability.
wait，await，wait behind，wait for，[电影]Sono toki wa kare ni yoroshiku；
[例句] 如果你等待，发生的只有变老。 If you wait, all that happens is that you get older.
[例句] 不要等待好事降临，你要向幸福进发。 Do not wait for good things to happen to you. You need to walk towards happiness.
contour (line)，isoheight，isoline，isohypse (line) （地形图上标高相等的点连成的封闭曲线），contour line ；
[例句] 刚好在450英尺的等高线之下有3个缓坡。 There were three moderate climbs to just below the 450 feet contour.
[例句] 等高线是用等间距图解描述构造形态的. Contours are graphic expressions with uniform spacing depicting a structure's character.
of equal value，equal in value，equivalence，equipollence ；
[例句] 这个情报可以当作筹码，从英国人那里换取等价的消息。 The information could be used as a bargaining chip to extract some parallel information from Britain.
[例句] 这等价于各种成分的平面波的角分布. This is equivalent to an angular distribution of constituent plane waves.
isochronal，isochronous，isochronic ；
[例句] 由于这个缘故,摆线又叫做等时曲线. For this reason the cycloid is called the tautochrone.
[例句] 该算法是一种等时性离散动态规划法. The algorithm is of the isochronic and discrete dynamic programming.
equidistance，isometry ；
[例句] 椅子等距摆放着. The chairs were placed at regular distances.
[例句] 利用改进的BP神经网络构造三次有理B样 条曲面等距面. Using improved BP neural network, equidistant surface reconstruction of NURBS is proposed.
equal altitude [height]，accordant ；
[例句] 必须使用诸如聚四氟乙烯支架等高阻抗结构. High impedance circuit construction, such as Teflon standoffs, must be used.
[例句] 可替代等高块, 用于测量零件的平行度,成对供应. Alternative for blocks, used to measure depth of parallelism ofparts.
isogonism，equal angles，equiangular ；
[例句] 等腰三角形有两条边相等,且有两个相等角. An equilateral triangle has all sides equal and all angles equal.
[例句] 等角图较透视图简单得多. Isometric drawing is much simpler than perspective drawing.
divide from the middle，[航空； 航海] halve，halving，part ；
[例句] 我们亦可把屏幕划分为四等分 、 六等分等等. We may also divide the screen into quarters , sixths, and so on.
[例句] 古代天文学家把黄道带分为12等分. The ancient astronomers divided zodiac into 12 equal segments.
secondary，medium，moderate，middling ；
equate，be equal ；
[例句] 把财富与幸福等同起来可能是危险的。 The equation of wealth with happiness can be dangerous.
[例句] 政治不能同艺术等同起来. Politics cannot be equated with art.
constant pressure line，[气] isobar，isobaric line，isopiestic ；
[例句] 在气象图上气压差用等压线表示. Pressure differences are indicated on weather maps by isobars.
[例句] 具有大致同心的等压线的低压区在技术上称为气旋. A region of low pressure with roughly concentric isobars is known technically as a cyclone.
isothermality，isothermy ；
isotherm，isothermal，isothermal curve，isothermal line ；
[例句] 吸附等温线是平衡方程式. The absorption isotherms are equilibrium equations.
[例句] 染料吸附可以用多层吸附等温线来描述. Dye adsorption can be described by a multilayer adsorption isotherm curve.
ordinary，unimportant，aimlessly，thoughtlessly ；
[例句] 大好时光,不可等闲度过. Don't fritter away your precious time.
[例句] 莫等闲, 白了少年头. Don't dawdle , the young head is soon white.
equal to，equivalent to，equal，be worth，amount ；
[例句] 任何数的0次方等于1。 Any number to the power of nought is equal to one.
[例句] 9%的利息减去7%的通货膨胀率等于2%。 9 percent interest less 7 percent inflation equals 2 percent.
[计] isogram，isoline，[化] contour line，isopleth ；
[例句] 通过平滑等值线得到的结果必然带有解释人员的倾向性. The result obtained by smoothing contours is inevitably biased by the interpreter.
[例句] 可以得出等值线的偏移位置. The migrated position of the contour can be found.
wait，expect，await，tarry，waiting ；
[例句] 持枪歹徒不慌不忙地走开，坐上一辆等候的汽车逃走了。 The gunmen calmly walked away and escaped in a waiting car.
[例句] 他们的医疗体系有很多不足：要排队等候，资源短缺，设备陈旧。 Their health-care system suffers from queues, shortages and ropey equipment.
equality，equation ；
[例句] 等式通常用两道横的等号来表示。 Equations are generally written with a two-bar equals sign.
[例句] 我们可以这样表示那个等式。 We can express that equation like that.
[化] isochronism ；
[例句] 该算法是一种等时性离散动态规划法. The algorithm is of the isochronic and discrete dynamic programming.
[例句] 等时性地层界面是沉积盆地成长过程中的主要记录之一. Isochronous stratigraphic interfaces are one of the most important marks of developing process of a basin.