The steps are easy to trace back.

易于将这些步骤倒退回去。

This way gem users can trace back a gem to a trusted source.

这样gem用户可以溯及一个gem至可信的源。

Aggregating such a trace back yields a quantified call-chain.

通过聚集这种反向跟踪，可以产生一个量化的调用链。

This is really a sad story. Did they trace back your luggage?

情况真是糟糕。他们找回你的行李了吗？

Tea houses in Hangzhou trace back to the Southern Song Dynasty (1127-1279).

杭州的茶馆历史可以追溯到南宋时期(1127 - 1279)。