由特拉华大学GeorgeMalone领导的研究员们在2000年开始着手处理这一问题。
Researchers led by George Malone at the University of Delaware began dealing with the problem in two thousand.
由特拉华大学GeorgeMalone领导的研究员们在2000年开始着手处理这一问题。
Researchers led by George Malone at the University of Delaware began dealing with the problem in two thousand.
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