V to change or become changed into ions (使)离子化
First, he has to ionise more CO 2.
首先，他必须离子化更多的CO 2。
To test this idea, she and her colleagues designed a device that USES short pulses of electricity to ionise the surrounding air, creating a purple plume of plasma rich in oxygen ions.
为了验证这个想法，她和同事们设计了一种设备，利用短脉冲电使周围空气离子化，产生紫色富含氧离子的等离子火焰。
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