But we have improved the technology greatly in recent years.

但我们最近几年已经大大地提高了该技术。

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But we can tell that they've improved a lot compared to last week.

但我们要说，和上周比起来，孩子们的进步太大了。

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But we can tell that they've improved a lot compared to last week.

但我们要说，和上周比起来，孩子们的进步太大了。

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