如何使用 "subtend" 造句

1. The others are trillions of bacteria , each equally an individual , which are found in a person 's gut , his mouth , his scalp , his skin and all of the crevices and orifices that subtend from his body 's surface .
这个系统的其他部分是数万亿个细菌,每个细菌相当于一个个体,它们存在于人的内脏,嘴,头皮,皮肤和所有他身体表面的接口和小洞里面。