16 We could not trace the ultimate source of the rumours.
17 Thus, a trace of ambiguity in the data can lower success rate.
18 New work contained the starting-point for a method of investigation, which made it possible to trace the development of heat in muscular movements.
19 We must trace the source of these noxious gases before they asphyxiate us.
20 The first problem is who is responsible for the material: the original author, who may be impossible to trace, or the Internet service provider.
21 In The Maltese Falcon, Sam Spade was hired to trace the missing figurine of a black bird.
22 David can trace his ancestry as far back as the seventeenth century, when one of them was a court trumpeter somewhere in Germany.
23 She left a trace of musky perfume behind her.
24 Now go back to the diagram at the top of the page and trace through the cycle of the alternation of generations.
25 It includes discrete identifiable trace fossils.
26 Some of its inventions have been ludicrous: like an app that sold coins to use at laundromats; but others are world-beaters: microprocessor and smartphones all trace their lineage to the valley.
27 These shoes, bound pieces of denim with soft soles designed to leave no trace in the Arizona desert, have been lost or abandoned by illegal immigrants traversing Mr Chiltern's 50,000-acre cattle ranch.
28 “Under the public Wi-Fi network situations, attackers can very easily eavesdrop and make falsifications on encrypted communications,” Hayashi added. “Victims cannot detect any trace of the attacks.”
29 Rescuers said they had searched the entire avalanche area and found no trace of the missing climbers. Commander of the local mountain gendarmes said it was possible the bodies were buried deep under the ice and snow.
30 We finally traced him to an address in Chicago.