but one must be careful, if the head stops at the

来源: Smart 于 2015-02-24 08:46:21 [] [旧帖] [给我悄悄话] 阅读数 : (72 bytes)
回答: 使劲弯腰，让脑袋尽量靠近后脚跟 由 jiangwen999 于 2015-02-24 08:44:36

middle, not able to touch the foot, it becomes to use "????" to think.

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