共参与

participational───adj.参与的

particulate inheritance───[遗]颗粒遗传

participating insurance───分红保险

participating insurances───参与保险

particulate matter───微粒物质；悬浮微粒

Methods: Using specially designed questionnaire, randomly selected pairs of voluntary unpaid blood donors to participate in a total of 962 individuals were investigated.───方法：采用专门设计调查表，对随机选择自愿参加个人无偿献血人员共962人进行调查。

A total of 32 teams from around the world participate in team events.───共有来自世界各地的32支球队参加南非世界杯。

Researchers in Thailand has selected the age of 18 to 30 years a total of 16000 volunteers to participate in the pilot.───研究人员在泰国挑选了年龄在18岁到30岁之间的共1.6万名志愿者参与试验。