意思是说，如果你拿不准以后会不会用到这些东西，那就试验一下：最近6个月用过没？

If you’re unsure of whether you’ll need something later, put it to a test: have you used it in the last six months?

youdao

Firefox浏览器以安全、快速、开源的特点赢得大众喜爱，通过使用火狐浏览器，你也许会列出很多技巧，下面这5个浏览秘籍你用过没？

The Firefox browser to safety, fast, open source features that gained popularity, through the use of the Firefox browser, you may list a lot of skills, the following 5 browse cheats you used?

youdao

我从来没再用过那本护照。

I never used that passport again.

youdao

No, fortunately for me, I have not actually been any of the people held at gunpoint.

不，我很幸运，我没被人用枪威胁过。

大城市是否危险？ - SpeakingMax英语口语达人