1The researchers were able to trace the outbreak of the disease to a contaminated water source.
2There is a trace of sadness in her voice when she talks about her childhood.
3The detective had to trace the suspect's movements on the night of the crime to gather evidence.
4The company's financial troubles can be traced back to a series of poor investment decisions made several years ago.
5The artist's use of bold colors and geometric shapes is a trace of her fascination with abstract expressionism.