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　　These changes have occurred over a long time span.

　　這些變化經(jīng)過(guò)了很長(cháng)一段時(shí)間才形成。

　　I must get these letters off first thing tomorrow.

　　我明天首先得把這些信件寄出去。

　　Or that these two have green eyes?

　　他們兩個(gè)有同樣的碧眼？