It's bleeding. 在流血。 My hand is swollen. 我手肿了。 I hit my knee and it's very stiff. 我膝盖撞到,它很难弯曲。 A: I have a cold? 我感冒了吗? B: I think so. You'll be all right. 我认为是,你会好的。 A: What is it? 那是什么? B: It's indigestion. For precaution, I'll give you a shot. 是消化不良,为了预防我给你打一针。 What's wrong with me? 有什么病?