I can think of three meanings for the word train right off the top of my head.

看到train，我脑中最先想到的有三个意思。

youdao

His pitch was simple: Cut 10 percent to 15 percent right off the top of the fees being billed.

他的意图很简单：要求立即削减账单费用的百分之十到百分之十五。

youdao

Start off the screenplay with "FADE IN:" right-aligned on the top corner of the page.

以“渐入：”作为剧本的开始，这几个字右对齐在剧本的右上角。

youdao

We just go through the list top to bottom, left to right, and cross names off as we go.

我们会从上到下，从左到右看那个问题清单，如果解决了就把名字擦掉。

哈佛公开课 - 计算机科学课程节选

I guess right now, off the top of my head, I'm really into, I've loved Kanye West forever.

我觉得现在，我脑子里想到的，我真的，喜欢肯耶·韦斯特，永远都喜欢。

只要是音乐就好 - SpeakingMax英语口语达人

Previously, he said he couldn't think of any right off the top of head.

CNN: Bush, Kerry bare knuckles in second debate

Fallon also couldn't escape the reports Wednesday, and acknowledged them right off the top of his "Late Night" monologue.

CNN: Leno swings at NBC as Fallon jokes about move

Right off the top of his speech, Karzai expressed his condolences for the losses Canadians have suffered in his country.

NPR: Afghan Leader Wants Canada's Troops to Stay