The experiment will not spray anything other than tapwater into the air, so it is not a test of geoengineering, since it will not have any effect on the climate or the weather.

这个试验只是将自来水而非其它物质喷向空中，不会对气候或天气产生任何影响，所以它不算是一项地球工程学的试验。

youdao

And even for those who can afford them they are not that effective since, by the time a farmer spots an infestation, it is too late to spray.

就算对那些有钱购买的人来说，化学杀虫剂也不是很有效，因为当种植户发现害虫将大规模出现的时候就已经太晚了。

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In most cases, it is possible to replace the spray by non-spray cleaning liquids and to do the cleaning properly.

在大多数情况下，最好用液体清洁剂取代喷雾清洁剂，并且正确的进行清洁工作。

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The magic, it turns out, is in that subatomic spray, as the group treated with an electron shower benefited from a polymerizing effect or, more plainly, a bonding of molecules just above the skin's surface that yielded a tough, protective nano-layer measuring between 50- to 100-billionths of a meter thick.

ENGADGET

In the minutes of its latest meeting the JCVI says the vaccine has "a good safety profile" and may be more widely accepted by parents and children because it is given in the form of a nasal spray.

BBC: Flu vaccines for all children

When it is time to make the plants male again, researchers spray on a chemical (which might also prove a money-spinner for the company) to trigger the activity of another foreign gene that blocks the activity of ribonuclease and allows pollen production once more.

ECONOMIST: Terminator genes