loose end

基本解释

Also, at the same time, with his right hand, he caught up the loose twine-end of a small bobbin.
与此同时，他用右手捏住小线轴上松了的线头。
The original cigarette-end detector for loose-end and filter-missing detection negatively affected cigarette surface, and usually had higher misrejecting rate.
原松头缺嘴检测器对于烟支外表面有一定的影响，且烟支误剔除率较高。
You have one little loose end -- hooking cursor events -- to finish up in the object constructor, then the rest of this article is devoted to filling out the object prototype.
还需要加上最后一点儿东西就可以完成对象构造方法 —— 连接鼠标事件，然后本文的其余部分将致力于填充对象原型。

Office parties—the year-end chance to relax with co-workers and let a little loose with the higher-ups you normally tip-toe around.
FORBES: True Stories From The Holiday Party Files
Update the roof: repair loose shingles and if your abode sits in a hurricane-vulnerable locale, consider adding gable end braces.
FORBES: As 'Frankenstorm' Threatens, Last-Minute Ways To Disaster-Proof Your Home
For all the fuss made about the end to quantitative easing, Japan's monetary policy is still super-loose, and will remain so for a good while.
ECONOMIST: Twitchy foreign hedge funds have sold too soon

A loose end is part of a story, situation, or crime that has not yet been explained.
If you are at loose ends, you are bored because you do not have anything to do and cannot think of anything that you want to do.