1.During surgery, such perforations allow passage of bacteria from the surgical site through the punctures.
在手术中，这种微小穿孔可使手术部位的细菌通过穿刺孔。
2.Vehicle waiting in a passing place to allow passage of oncoming vehicle or following vehicle to pass.
在让车处暂停，让路给迎面或尾随的车辆驶过。
3.as the path here is caught between cliff , it is so narrow as to allow passage of only one person.
一线天夹在两边的悬崖绝壁之间，狭窄得一次只能容一人通过。