英译中（1）Effect of Highly Dispersed Iron Catalyst on Direct Liq

英译中（1）Effect of Highly Dispersed Iron Catalyst on Direct Liquefaction Coalof
（1）Effect of Highly Dispersed Iron Catalyst on Direct Liquefaction of Coal
（2）Activity of iron based catalyst at lower temperatures in direct coal liquefaction
（3）Improvement of coal direct liquefaction by steam pretreatment
（4）Molecular simulation of thermal direct coal liquefaction
可任选其中的几个，多多益善