But there are also many tricks hiding technical elements, starting with the countless air conditioning ducts, unsightly but oh so essential in Riyadh where differences in temperature are extreme.
但是仍然有很多技巧隐藏着技术性的元素，以无数的空调管道为例，虽然不雅观，但是在利雅得，这个不同极端天气存在的地方，却显得极为必要。
He rebuked officials hiding "behind minor institutional or technical difficulties in order to avoid taking action."
他指责那些官员躲在“机构性或技术性困难背后，就是不愿采取行动。”
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