highyieldn.高产额highadj.高的；高尚的；高级的；高度的；全盛的adv.高；奢侈地；音调高n.高水平；高气压；（麻醉品带来的）快感high and low pressure turbine高低压汽轮机high-rise sickroom building高层病房楼High-speed image processing高速图像处理High -speed data collecting高速数据采集High Speed Ground Test Center地面高速试验中心high-energy X-ray imaging高能X射线成像high frequency electric field高频电场high heat duty fireclay brick耐高温粘土砖high melting point refractory高熔点耐火材料high strength wire cable mesh高强钢绞线网

1. Here we should use a falling tone.
   这里我们应该用降调。
2. Read this sentence and use the falling tone, please.
   请用降调读这个句子。