There were three professors at the railway station.They were deep in conversation.
三位教授在火车站一边等车，一边兴致勃勃地聊着。
There were three professors at the railway station.
三位教授在火车站。
There are three professors at the railway station. They were deep in conversation.
火车站有三位教授，他们专心致志地交谈着。
Three professors are invited to evaluate the teaching plans by the three new teachers.
三位教授被请来对新教员设计的教案作出评估。
Three professors are invited to evaluate the teaching plans by the three new teachers.
三位教授被请来对新教员设计的教案作出评估。
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