Video assistant referees were introduced to the World Cup in 2018, and just 4 years later, we already have an upgrade to the technology.
2018 年世足赛时推出了影像辅助裁判（VAR），而仅仅 4 年后，这个技术就已经出现了升级。
| 单词 | assistant referees |
| 例句 |
原声例句
2022卡塔尔世界杯 Video assistant referees were introduced to the World Cup in 2018, and just 4 years later, we already have an upgrade to the technology. 2018 年世足赛时推出了影像辅助裁判（VAR），而仅仅 4 年后，这个技术就已经出现了升级。 |
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