小城镇生活的双重性—安全但乏味the double-edged quality of life in a small town—security and boredom这种双重性导致了法律保护方法的复杂性.This duality has caused the complexity of the legal protection method.由此可见,替代生计体现着流域管理目标的双重性.The alternative liveliho...
Twelve potential vaccines are currently being tested on human volunteers.目前正在人类志愿者身上试验12种试用疫苗。Anti-malarial vaccines are now under-going trials.抗疟疾的疫苗正在试验阶段。His team are at the forefront of scientific research into vacci...