下面这两个副词均含"……以前"的含义： ago ：指从现在起往前推算一段时间，始终置于所修饰的词之后，与一般过去时连用。 before ：或指从过去某一时间起向前推算的若干时间的以前，通常与过去完成时连用；或泛指以前，并不具体指若干时间以前，可使用现在完成的或过去时；还可指从将来某一时间起的若干时间以前。
Mechanization happened years ago on the farms of Islay.数年前，艾莱的农场就实现了机械化。Rationing had put an end to a surfeit of biscuits long ago.定量供应很久以前就结束了饼干过剩的状况。Their water was turned off weeks ago without explanation.他们的水在几周以前就毫无...
A hundred years ago coronary heart disease was virtually unknown in Europe and America.在100年前冠心病几乎不存在于欧洲和美洲。Cato , an influential Roman thinker, 000 years ago, praised its medical value.CatotheElder是两千年前一位古罗马很具影响力的思想家, 以...
In the course of time, many of their myths become entangled.最后，他们很多荒诞的说法都变得错综复杂了。Some objects had got entangled with the underneath mechanism of the engine.一些东西缠在了发动机下面的机件上。This case was bound to get entangled in interna...
The potassium chromate method is one regular method to determine COD.重铬酸钾法是测定化学需氧量的常规方法.It's a two - component, chromate free, epoxy polyamide adduct shop primer especially designed.是一种不含铬的双组份环氧聚酰胺加成物的车间底漆.Two - sta...
Remember to be tactful when expressing a personal judgement.记住表达个人看法要婉转.I decided it wouldn't be tactful to order another beer.我想了想，觉得再要啤酒就有点过分了。He had been extremely tactful in dealing with the financial question.....