Like, when they added an estimated mutation rate into their calculations, they were able to work backward, tracing the modern Y chromosome back to a single dude about 190,000 years ago.

就像，当他们在计算中加入估计的突变率时，他们能够向后工作， 将现代 Y 染色体追溯到大约 190, 000 年前的一个人。