CEabbr.化学工程师（=Chemical Engineer）abbr.土木工程师（=Civil Engineer）CEEPPn.中东欧出版工程

1. A scar may overgrow into a ke1oid.
   伤痕可能变得过大而成为瘢痕疙瘩。
2. Scar tissue can cause the artery to became narrow again.
   瘢痕组织能够造成动脉再次变窄。