They come silent and go without leaving a trace.

它悄悄地到来又走的无影无踪。

youdao

Silly people who abuse, Lang has been fickle without leaving a trace, why bother Yiyi?

痴心的人儿，郎已薄幸无踪，何苦依依？

youdao

To be addicted to love is to forget yourself and your ego and disappear into the whole, without leaving a trace behind.

融入爱，就是忘掉你自己，让你的自我消失在整体中，不留下一丝痕迹。

youdao

But he believes that with more experimentation and tweaking, someone could easily access a significant fraction of hotel rooms around the country without leaving a trace.

FORBES: Hacker Will Expose Potential Security Flaw In Four Million Hotel Room Keycard Locks

This is a very serious vulnerability indeed, as it means that someone could get access to data stored on an iOS device without leaving a trace.

FORBES: New iOS Lock Screen Vulnerability Uncovered

Cottonseed oil is also the primary input in the production of Olestra, a frying fat that glides through humans without leaving a trace of fat or calories, and is also an important source of vitamin E for pharmaceutical producers.

NPR: Texas Cotton: 'Farmer Profits at Every Step'