We are justified in assuming that the gas behaves isothermally if the thermal penetration depth in the liquid is small compared to the size of the cavity. 我们有理由假设在液体中的热穿透深度相对于空腔的尺寸很小时，气体的行为是等温的。
The column was operated isothermally at 130°C with helium as the carrier gas at 30 ml min 1.