The cut healed up without leaving a scar.

伤口愈合没留下疤痕。

《牛津词典》

Today, the scar of destruction is still seen.

今天，破坏的的伤痕依然可见。

youdao

This scar is from the bite of a dog.

这是狗咬后留下的伤疤。

youdao

The many areas of hardened or scar tissue give the disease its name.

VOA: special.2009.01.06

Eventually you develop a scab, as it healed, and then it would--and then the scab would fall off, and you'd be left with a scar.

愈合之后会变成一个疤,这个疤后来会脱落,你身上会留下疤痕

耶鲁公开课 - 生物医学工程探索课程节选

One of the men had a large red scar across his forehead.

VOA: special.2009.12.12

When the suits are heard, expect a parade of experts to testify that an improper lens can scar the cornea and lead to vision problems.

FORBES: An Eye For An Eye

When the suits are heard, a parade of experts can be expected to testify that an improper lens can painfully scar the cornea and potentially lead to vision problems and even partial blindness.

FORBES: An Eye For An Eye

His nose had been broken and his mouth was cut at one corner and the line of the scar across the upper lip and lower jaw showed through the growth of beard over his face.

NPR: Robert Jordan, Hemingway's Bipartisan Hero