回复：两方面，量化不易，各人与机构不能比，资源太有限

来源: murmur.on.hudson 于 2010-02-01 22:55:24 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (124 bytes)
回答: 如果你孩子>15岁，交给他做好了 由 murmur.on.hudson 于 2010-02-01 22:24:19

There are very simple mechanical systems that work. Not doing it quantitatively usually leads the way to losing eventually.

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• "simple mechanical systems that work", 多谢 -不较真儿- ♀ 给 不较真儿 发送悄悄话 (0 bytes) () 02/01/2010 postreply 23:37:11

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