...n
catalysts and has the following technical characteristics.这个句子中的to produce用法对吗?是不是The technology for methylation of toluene with
methanol to produce xylenes整体构成一个名词?这里的to produce是什么语法结构?S-SMT dehydrogenation of
ethylbenzene to pro...
Doris walked in the forest causiouly, afraid of being attacked by giant snakes.I tiptoed into my father's room, careful to step over the creaky floor.这两句话我都能看懂,但是无法理解 afraid of 和 careful to的表达和做的成分