Malaria is caused by a parasite transmitted by a certain species of mosquito.

VOA: standard.2010.04.23

So, some of these cases were probably due to polio that was transmitted by incompletely killed virus that was present in the vaccine.

因此,那些病例的发病的原因,是被那些疫苗中携带的,没有被完全杀死的病毒感染

耶鲁公开课 - 生物医学工程探索课程节选

These materials were transmitted and developed by different circles within Israelite society over centuries, and they crystallized at different times.

这些资料被传播发展,几世纪来，由以色列社会中的不同圈子，它们曾在不同的时期都非常明确。

耶鲁公开课 - 旧约导论课程节选

Because it's passed by-- can be passed by an oral route it's a disease that's very effectively transmitted in school settings where children are together, or childcare settings.

因为脊髓灰质炎病毒可以,经口传染途径进行传播,因此它是一种,极易在学校传播的疾病,在这些地方孩子们都聚集在一起

耶鲁公开课 - 生物医学工程探索课程节选

Sometimes signals are transmitted between cells by cell/cell contact.

有时细胞与细胞靠互相接触进行信号传递

耶鲁公开课 - 生物医学工程探索课程节选