When the engineered t7 is unleashed on a biofilm , it invades the top layer of bacteria .
改造好的t7噬菌被释放到生物膜上后，它就开始侵入上层的细菌。
The religion that invades the public square most overtly is islam : it affords secular power the least respect , teaching that the primary unit of society is theumma , the international brotherhood of believers .
