大都会州立大学助理教授尼古拉斯·哈特勒普说：“进展不大。”

"There hasn't been much progress," says Nicholas Hartlep, an assistant professor at Metropolitan State University.

youdao

大都会州立大学助理教授尼古拉斯·哈特勒普说：“进展不大。”

"There hasn't been much progress," says Nicholas Hartlep, an assistant professor at Metropolitan State University.

youdao