人们早已知道，如果材料的表面积足够大，可引起催化反应。It had been known for some time that chemical reactions can be catalyzed by materials with large surface areas.它们对被它们催化的反应有很强的专一性.They are highly specific for the reactions that they catalyze.在...
我为几个密友办了晚宴。I gave a dinner party for a few close friends.他是他们的顾问、密友和倾听者。He was their adviser, confidant and father confessor.她从来就不是我的密友。She never was a close friend of mine....
It was a tough course over a gradual ascent before the big climb of Bluebell Hill.在爬崎岖的蓝钟山之前有一段很难走的上行缓坡路。The girl picked herself up and pulled a bluebell out of her hair.姑娘坐起身来,从头发里摘出一枝风信子.Bluebell Fragrance. Fragrances ...