一束质子撞击在一个固定靶上，制造出一群散射而出，且在几分之一秒之后就会衰变成中微子的介子。

A bunch of protons smash into a fixed target, creating a horde of scattered mesons, which last for fractions of a second before decaying into neutrinos.

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我们的拖车固定在一幢老旧的宅邸上，这幢曾经庄严的豪宅如今被截成了很多廉价公寓。拖车四周是一大群同病相怜的拖车，以及一些被雨水冲刷白了的简陋棚屋。

It was anchored by an old, once-stately mansion that was cut-up into cheap apartments, and was surrounded by a sad assembly of rundown trailers and a couple white-washed shack homes.

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富有挑战性的经济环境使得公司必须更加注重固定现有的客户群，并且开拓新的客户群。

Challenging economic climates make it imperative for companies to increase their focus on retaining existing customers and attracting new ones.

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