西安理工大学英语考试翻译

1.Los Alamos National Laboratory scientists are using a new technique to see fingerprints on surfaces that typically make them invisible. The method uses a technology called mini-X-ray fluorescence to detect chemical elements in fingerprints without altering them, said Christopher Worley, a scientist on the project. “The conventional methods are meant to bring out fingerprint patterns with regular light and they have to treat those with powder, which alters them,” Worley said.“With this you don'