nude ion gauge

例句：

1. 1. The engineer used the neutral ion gauge to measure the concentration of pollutants in the air.
   工程师使用中性离子计来测量空气中污染物的浓度。
2. 2. The research team developed a new neutral ion gauge that could detect trace amounts of heavy metals.
   研究团队开发了一种新的中性离子计，能够检测重金属的微量。
3. 3. The neutral ion gauge was crucial for the scientists' experiments, as it allowed them to accuratelymeasure the pH levels of the samples.
   中性离子计对于科学家们的实验至关重要，因为它允许他们准确地测量样品的pH值。