他们研究吸热的原理.They work on a principle of heat absorption.此过程是吸热的,同时很快发生碳积沉并使催化剂活性减低.This process is endothermic with rapid carbon deposition and deactivation of the catalyst....

“吸热的”的英语可以翻译为：[医] endothermal，endothermic ...