“bulla”可以造什么句，bulla造句

Objective To discuss the experience in surgical treatment of gravis pulmonary bulla and in management during peri-operation.

The official document issued by the Pope was sealed with a bulla.

The morphology of agger cells differed widely, but its relationship to the anterior border of the middle nasal concha, bulla ethmoidalis and nasolacrimal canal was quite stable;