| 短语 | train sth on/upon |
| 释义 | train sth on/upon把某物指向;瞄准：When a large fierce eagle appeared in the sky，the hunter trained his hunting rifle on it and fired at once.当一只凶恶的大鹰出现在天空时，那猎人立即把猎枪瞄准大鹰开枪。 |
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