词汇	rectal ulcer
释义	rectal ulcer 直肠溃疡
随便看	safety performance test safety period Safety period safety period for contraception safety permission safety personnel safe-type system safety pharmacology safety philosophy safety physiology safety piece safety pillar safety pillar against water-inrush safety pillars safety pillars under water-bodies safety pillar under water-bodies safety pilot safety pin Safety-pin safety pin breaking ejector safety pin chain safety pin coupling Safety Pin Fault safety pin forceps safety pin for storing artery forceps