Tom has made great progress, which makes his parents very happy.
汤姆进步很大，这使他父母很高兴。
He made another wonderful discovery, of which is great importance to science.
他又一次惊人的发现对科学具有重要意义。
This is the subject on which he made great progress.
这就是他取得巨大进步的科目。
This is the subject on which he made great progress.
这就是他取得巨大进步的科目。
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