| 词汇 | train on/upon |
| 释义 | phrasetrain on/upon ! Train upon is more formal than train on and is mostly used in writing. train sth on/upon sb/sth to aim a gun, camera etc at someone or something and keep it pointing at them: All the TV cameras and microphones were trained on him, but Mellor refused to comment. The man stood beside the sofa, the black revolver trained on her. |
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