且不完善
And not perfect
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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看起来这好象将是一项长期、艰巨而且不完善的任务。
It looked as if it were going to be a long, laborious, imperfect task.
更早的统计数字是更低的而且不完善。这项新研究的作者们说它仍可能低估了世界范围内的实际面积范围。
Earlier estimates were much lower but incomplete. The authors of the new study say it may still underestimate the true extent worldwide.
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