Here's why: In 1830 a local official named George Rankin lowered himself into the cave on a rope tied to a protrusion in the cave wall.

原因如下：1830年，一位名叫乔治·兰金（George Rankin）的当地官员用一根绳子把自己吊入洞穴，这根绳子固定在洞穴壁的一个突出石块上。

youdao

A local official says most poor bereaved families do the same.

当地官员称许多刚丧失亲人的贫困家庭都这样做。

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The local official jobless rate is already 18% (though this ignores a lively "informal" economy).

当地官方统计的失业率已经达到了18%（虽然这个数字忽略了活跃的“非正式”经济）。

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This happens when an official language is used more often and children stop learning the local language of their parents.

VOA: special.2009.12.02

Also,local governments usually keep official copies of birth, marriage and death records.

VOA: special.2010.06.28

Coolidge's father was a local court official there.

VOA: special.2010.12.16

Local official Peter Owusu-Ashia told Reuters that another injured miner later died in hospital.

BBC: Ghana gold mine collapse kills 16

One other local official was fired and five others received warnings or administrative demerits, Xinhua said.

WSJ: Chinese Woman in Forced-Abortion Case Claims Harassment

State-run Ashorooq TV, quoting a local official, reported Thursday that the collapse killed more than 60 people.

CNN: Dozens dead in Sudan mine collapse