three-card memory [计] 三卡存储器
three card memory
三卡存储器
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Some 500 people have been given electronic-book readers, a gadget the size of a paperback with a screen like that of a laptop computer and a slot to take a memory card that can store three or four novels.
ECONOMIST: Electronic books
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