人体的免疫系统是抵御疾病的主要屏障。The immune system is our main defence against disease.这些人造屏障将会确保提供高度的保护。These man-made barriers will ensure a very high degree of protection.燕山是北京的天然屏障.The Yanshan Hills provide a natural defence for Be...
Quinine: Alkaloid found in the bark of cinchona trees and shrubs.奎宁: 金鸡纳树皮中的生物碱,主要用于治疗疟疾.It is a curare alkaloid derived from the South American plant.它是箭毒碱,提取自一种南美产的植物.Morphine: Heterocyclic compound, narcotic analgesic...
The price may go up quite substantially.价格可能大大上扬。The price was substantially higher than had been expected.价格比预计的要高很多。The percentage of girls in engineering has increased substantially...学工科的女孩的比例已经大大增加了。The impoverished...