我们把信装在一个信封里，信封上有艾比和露西的照片，地址是“致上帝/天堂”。
We put the letter in an envelope with a picture of Abbey and Lucy and addressed it to God/Heaven.
之所以这么说，是因为根据在埃塞俄比亚的新发现，大约在340万年前，一种可能和著名化石露西同种的猿人就开始使用石器工具切割大型哺乳动物的肉。
Because new discoveries from Ethiopia show that what was likely the species of the famous fossil Lucy used stone tools to butcher meat from big mammals-about 3.4 million years ago.
露西属于南猿亚科（Australopithecus afarensis），其残骸于1974年在埃塞俄比亚的另一个发掘点出土。
The remains of Lucy, who belongs to the species Australopithecus afarensis, were uncovered in another part of Ethiopia in 1974.
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