It had been known for some time that chemical reactions can be catalyzed by materials with large surface areas.人们早已知道，如果材料的表面积足够大，可引起催化反应。Modern technology catalyzed tremendous economic growth in China.现代技术促成了中国经济的巨大发展。T...
不带宾语的动词称为不及物动词.Verbs that do not take object are called intransitive verbs.带宾语的动词称为及物动词.Verbs that take object are called transitive verbs.及物动词要有宾语.Transitive verbs take an object....