Indeed, Mr. Prance's new device can pick up the trace of a heartbeat from a metre away.

事实上，Prance 先生的新设备可以在一米之外捕捉到心跳的痕迹。

youdao

Our efforts to trace him turned up nothing.

我们辛辛苦苦跟踪他，却无功而返。

《牛津词典》

Once the trace is taken, we will look deep into what makes up this trace and how to use it to your advantage to get to the bottom of a problem.

完成跟踪后，我们将深入了解跟踪由哪些部分组成，以及如何使用跟踪来帮助找到问题的根源。

youdao

"And like most sufferers of joke-itis, he had long since given up any trace of being funny, and instead deployed an endless barrage of grimace-inducing puns and lame insults".

BBC: The Thick Of It: When life imitates sweary art

They use false details or hide behind anonymous e-mail addresses when signing up, and are almost impossible to trace.

BBC: Fake websites shut down by police

The sauce is based on a light sweet-and-sour, pepped up with a deep chile spiciness and a trace of Sichuan pepper that will make your lips tingle pleasantly.

NPR: Savoring The Spice In Kung Pao Chicken