It is a bleeding or spilling into successive signs in such a way that it perpetually leaves what Derrida calls "traces." That is to say, as we examine the unfolding of a speech act, we see the way in which successive signs are contaminated.

它渗入或涌入一系列符号之中,并且永恒地留下了德里达所说的，“痕迹“，也就是说，如果我们研究言语行为，我们就能看到连续的符号被污染的方式。

耶鲁公开课 - 文学理论导论课程节选

You've probably seen agar plates, if you smear a solution that's contaminated with bacteria on it, then that bacteria will grow on this agar rich medium and you'll get many, many copies of the bacteria that you've smeared at low density onto the plate.

你们大概见过琼脂培养基,如果将有细菌的溶液涂抹在培养基上,细菌就会在富含琼脂的培养基上生长,你会得到许多许多细菌,即使你只涂抹了低浓度溶液

耶鲁公开课 - 生物医学工程探索课程节选