1. 乡间小路;林间小道
    A trail is a rough path across open country or through forests.

    e.g. He was following a broad trail through the trees.
           他沿着林间的一条阔路行进。

2. （特定）路线，路径
    A trail is a route along a series of paths or roads, often one that has been planned and marked out for a particular purpose.

    e.g. ...a large area of woodland with hiking and walking trails.
           间有远足与散步路线的一大片林地

3. （一串）痕迹，足迹，踪迹
    A trail is a series of marks or other signs of movement or other activities left by someone or something.

trail的反义词

    e.g. Everywhere in the house was a sticky trail of orange juice...
           家里到处是泼洒的橙汁留下的黏糊糊的痕迹。
    e.g. He left a trail of clues at the scenes of his crimes…
           他在犯罪现场留下了一些蛛丝马迹。

4. 跟踪;追踪;追猎
    If you trail someone or something, you follow them secretly, often by finding the marks or signs that they have left.

    e.g. Two detectives were trailing him...
           两个侦探正在追踪他。
    e.g. I trailed her to a shop in Kensington.
           我跟踪她来到肯辛顿的一家商店。

5. (竞选)巡游路线
    You can refer to all the places that a politician visits in the period before an election as their campaign trail .

    e.g. During a recent speech on the campaign trail, he was interrupted by hecklers.
           在最近的一次竞选巡游演讲中，他被起哄者中途打断。
    e.g. …at the end of a hard day on the election trail.
           选举巡游途中难熬的一天结束之时

6. (使)拖在后面;(使)下垂;(使)曳地
    If you trail something or it trails, it hangs down loosely behind you as you move along.

    e.g. She came down the stairs slowly, trailing the coat behind her...
           她慢慢走下楼梯，大衣在身后拖曳着。
    e.g. He let his fingers trail in the water.
           他把手伸进水里，任水流滑过指间。

7. (常指跟着别人)拖沓行走，没精打采地走
    If someone trails somewhere, they move there slowly, without any energy or enthusiasm, often following someone else.

    e.g. He trailed through the wet Manhattan streets...
           他没精打采地走过曼哈顿湿漉漉的街道。
    e.g. I spent a long afternoon trailing behind him.
           整个下午我都拖着步子跟在他身后。

8. (比分)落后
    If a person or team in a sports match or other contest is trailing, they have a lower score than their opponents.

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    e.g. He scored again, leaving Dartford trailing 3-0 at the break...
           他又进球了，使得中场休息时达特福德队以 3: 0 落后。
    e.g. The polls showed the Tories trailing behind the Government by 17 per cent.
           民调显示，保守党落后于政府 17 个百分点。

9. 追踪;寻找
    If you are on the trail of a person or thing, you are trying hard to find them or find out about them.

trail的近义词

    e.g. The police were hot on his trail...
           警方正全力追捕他。
    e.g. There was a newspaper on the trail of the story.
           有一家报纸在追踪报道此事。

10. see also: nature trail;paper trail. to blaze a trail
       -> see blaze

相关词组：trail off