Drop the needles on the paper and calculate the percentage that fall on a line. With enough attempts, the answer should be the needle length divided by the width between lines, all multiplied by 2/pi.

将针随便丢在纸上，然后计算出落在线上的针的百分比，随着尝试次数的足够多，最终这个百分比将越来越逼近针的长度除以格子的宽度再乘以2/pi。

youdao

That interlude gives the dolphin just enough time to drop its sponge, surface to get a breath, and dive again to snag the fish, most of which are about 12 centimeters in length.

趁着这个间隙，海豚会丢掉嘴中的海绵，浮出海面换气，接着马上潜入水里捕捉这些长度只有12 cm的底栖鱼。

youdao

Those constructs include type constraints, length constraints, control types (drop-down list, text input, range), and iterative structures.

那些构造包括类型约束、长度约束、控制类型（下拉列表、文本输入、范围）和迭代结构。

youdao

If you drop the arrow, it's the usual convention, if you're talking about the length of the vector A.

如果你把箭头去掉,就表示矢量 A 的模长,这是约定俗成的

耶鲁公开课 - 基础物理课程节选

The French aristocrats continued to dominate territory but Munster's ferocious defence kept them at arm's length and Elissalde was reduced to attempting another drop-goal, which drifted wide.

BBC: Munster 16-13 Toulouse

With eight minutes to go, Hill's attempted drop-goal was well charged down by Jerome Fillol but just when it looked like a length-of-the-field breakaway could be on the cards, he knocked on, summing up his team's afternoon.

BBC: Bristol 17-0 Stade Francais