在正式实施这项名叫“香料”——向平流层注入物质的气候工程——的完整计划前，小组将用一个微缩模型进行一个可行性测试。

Before embarking on the full project known as' Spice '- Stratospheric particle injection for climate engineering - the team will conduct feasibility tests with a miniature version of the technology.

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这些就是目前的原理，迄今为止，除了一些在低海拔的飞行测试，唯一的平流层测试是涉及一个按比例缩小拴在气象气球上的模型。

That is the theory, at least. So far, apart from some low-altitude test flights, the only stratospheric tests have involved a scaled-down version tethered to a weather balloon.

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目前对飞船只进行了一些低海拔的飞行测试，平流层的测试则仅仅是由气象探测气球负载着规模缩小的模型原型机来进行的。

So far, apart from some low-altitude test flights, the only stratospheric tests have involved a scaled-down version tethered to a weather balloon.

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