Most existing data centres rely on air cooling.

大多数现有数据中心依赖空气冷却。

So air cooling has been the de facto standard.

空气冷却已成为事实上标准。

Although, appreciating the cooling air from the pesticides is some legendary glass-half-full thinking.

如此，认为虫剂带来令人愉悦想法，可谓是典型“半杯水”乐观主义。

Google argues, water cooling reduces energy use by about 10% compared to air cooling, but the perception problem is real.

谷歌辩称，与冷相比，水冷可将能耗降低约10%，但这种认知问题确实存在。