After Italy, I went to Central America and worked with a team ofvolunteers.
从意大利回来后，我去了中美洲，和一群志愿者一起工作。
2
The results tally closely with those obtained when human volunteers were asked to assess audibility in test environments (Journal of the Acoustical Society of America, DOI: 10.1121/1.3268612).
测出结果完全与志愿者在实际试验环境中用人耳听出的评价相符。
3
A team of researchers from laboratories in America, Britain, Germany and Norway used an imaging machine to scan the brains of a group of volunteers who were set a "flanker" test.