她快步走了一会儿，以排解心中的沮丧。She went for a brisk walk to work off her frustration.连一辆出租车都打不到，他很沮丧。He was frustrated by his inability to wave down a taxi.人群毫无热情的迟钝反应使我感到很沮丧。I'm depressed by the bovine enthusiasm of the crowd&#...
Hydrotalcite - rare earth - Zinc complex heating stabilizer was prepared, its'stability was compared.研究了水滑石 - 稀土 - 锌复合热稳定剂的制备, 并比较了其热稳定效果.This thesis selects hydrotalcite as selective IR absorption material by its c...