“穿着法衣的”可以翻译为“in canonical robes” 或者 “wearing canonical attire” 。
“canonical robes” 和 “canonical attire” 都专门指神职人员等穿着的正式法衣。例如：The priest in canonical robes walked slowly down the aisle.（那位穿着法衣的神父缓缓地沿着过道走来。）