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来源: 于 2010-07-12 06:43:49 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

In this case, "take time to improve ..." is better than "spend time improving ...".

If you're saying how you spent the time (or money), use the -ing form.

If you're saying why you spent the time (or money), use the to - form.