| 词组 | train |
| 释义 | train [trained, trained, training] train 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. train up train sb up • train up sb especially BrE to teach someone a particular job, skill or subject, until they reach the necessary standard: ▪ The company takes new graduates, and trains them up over a period of two years. train upon ► see ↑train on |
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