His broken leg healed up really quickly.

他的断腿很快就痊愈了。

After a month, the wound had almost healed up.

【up】一个月后，伤口差不多痊愈了。

Within three weeks of applying the phages, the chronic infection had healed up, where before, no antibiotic was working.

在使用噬菌体后的三周内， 慢性感染就痊愈了，而在此之前， 抗生素是无效的。

If he chanced to cut his hand, he treated the wound with an ever-present fluid containing salts, and it healed up in a few days.

如果他碰巧割伤了手， 他会用一种常存的含盐液体来治疗伤口， 几天后伤口就痊愈了。