The CTC displays little variation during a period of first 356 runs, followed by the degression of CTC for the subsequent 127 samples and the ensuing relatively lower level of CTC for next 65 runs.

• 在测量前356个样品时仪器的燃烧转化率几乎不变，测量接下来的127个样品时燃烧转化率逐渐递减，而最后65个样品的燃烧转化率保持在另一个显著降低的水平。