1·K. Neon, argon, and krypton are obtained from fractional distillation of liquid air.
氖、氩、氪都能够通过分馏液态空气获得。
2·Let's say you're doing a fractional distillation of some sort.
可以说我们是在，做某种分馏。
3·Learning 4 sets of production unit: MTBE, fractional distillation, cracking and cracking by catalytic agent.
实习期间学习的四套装置为MTBE，气体分馏，重整和催化裂化装置。