 |
| |||
| 清除区 | |||
| 净面积; 有效面积 | |||
| 有效截面积; 清除 〔零〕区; 符号识别空白区; 无字区; 透明区; 清洁〔干净〕区 | |||
| 有效截面面积 | |||
| 明区 | |||
| 空白区; 干净区; 畅通区; 安全道; 清晰区域; 清零区; 清洁区; 未存储区; 应拆除的居住区 | |||
| 空白区字符识别中，不应出现任何符号的区域; 掩模透明区 | |||
| 有效截面积 | |||
| 无障碍区域 | |||
| 有效截面 | |||
| clear area: 10 phrases in 5 subjects |
| Agriculture | 2 |
| Chemistry | 2 |
| Explosives and Explosive Ordnance Disposal | 1 |
| Football | 3 |
| Technology | 2 |
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