They are known as "second generation" drugs, designed to alleviate side effects of older "first generation" medicines that often caused muscle spasms and stiffness.

VOA: standard.2010.07.08

They often involve the generation of what are called 'second messenger' molecules which carry the signal further into the cell.

过程中通常会生成一种叫做,第二信使的分子,将信号更深入地传递至细胞内部

耶鲁公开课 - 生物医学工程探索课程节选

If we just thought about that second part of it, just the antibody generation, or the humoral what we called last time--last week, the humoral immune response, the immune response associated with humoral immune response of antibodies in the blood and in other fluids.

当我们仅考虑上述过程的第二步,也就是产生抗体的部分,或是我们上周学习的,体液免疫应答,这种免疫应答与,血液中以及其他体液中的抗体有关

耶鲁公开课 - 生物医学工程探索课程节选

Economist Vincent Chan from Credit Suisse in Hong Kong believes the main problem for the government is to manage expectations of the second generation of migrant workers who form the back bone of China's success.

VOA: standard.2010.06.24

Some people are second-generation fans whose own children are now growing up with Special English.

VOA: special.2009.04.06