sample是什么意思？

The scientist confirmed the snake was a previously unknown species after conducting a genetic analysis of tissue samples.

When the rats detect the smell, they stop and rub their legs to indicate a sample is infected.

Extracurricular activities reflect the differences in child rearing in the Pew survey, which was of a nationally representative sample of 1,807 parents.

My own research at the Stanford Center on Adolescence uses in-depth interviews with small samples of youngsters rather than large-scale surveys.

During commercials, an overlay will appear at the bottom of the screen, prompting viewers to press a button to request a free sample or order a catalogue.

But this third group was not only unexpected, it was so distinct and so large—nearly one third of our sample—that it became a key finding of the study.

To test the polluting power of fulmars, researchers collected samples of deposit from eleven ponds on Devon Island.

In the 1930s,when only one in 10 Americans had a degree from a four-year college, an admissions committee was content to ask for a sample of applicants'chool papers to assess their writing ability

In the old days, applicants only had to submit a sample of their school papers to show their writing ability

Within samples collected from the solid substances lying beneath the ice.