常见例句Stage 2B: Operculated, traction to retina released. 有盖的，（玻璃体）对网膜的牵引解除。Stage 3: >=400 microns in diameter, operculated, traction released. 裂孔直径400微米以上，有盖，（玻璃体）对网膜的牵引解除。 返回 operculated