你给我捶背，我替你搔痒。

Scratch my back and I'll scratch yours.

绵羊的搔痒病因子可能也是类病毒。

The scrapie agent in sheep may be similar to viroids.

房间里的人在打哈欠，或者在替自己搔痒。

The occupants of the rooms are yawning, or else scratching themselves.

吃饭时不要搔痒，不要吐唾沫、咳嗽，也不要擤鼻子，除非确有必要。

Being set at meat scratch not, neither spit, cough, or blow your nose except there's a necessity for it.

系统回顾：严重头痛，盲视，视物模糊，手及颜面水肿，上腹痛，搔痒，尿痛，发热。

Review of Systems: Severe headaches, scotomas, blurred vision, hand and face edema, epigastric pain, pruritus, dysuria, fever.