你知不知道当你把名片留与仆人时，为了暗示你来拜访过主人给他请安，你必须折叠名片的哪一角？
Do you know which corner of a visiting card you must fold when leaving it with a footman in order to indicate that you have called on to inquire after the master's health?
你知不知道当你把名片留与仆人时，为了暗示你来拜访过主人给他请安，你必须折叠名片的哪一角？
Do you know which corner of a visiting card you must fold when leaving it with a footman in order to indicate that you have called on to inquire after the masters health?
你知不知道当你把拜访卡留与仆人时，为了暗示你来拜访过主人给他请安，你必须折叠拜访卡的哪一角？
Do you know which corner of a visiting card you must fold when leaving it with a footman in order to indicate that you have called to inquire after the master's health?
你知不知道当你把拜访卡留与仆人时，为了暗示你来拜访过主人给他请安，你必须折叠拜访卡的哪一角？不知道？
Do you know which corner of a visiting card you must fold when leaving it with a footman in order to indicate that you have called on to inquire after the master's health?
相反，你必须使用化学物质使分子精确地折叠起来，这需要形成结。
Instead you've got to use chemistry to make the molecules fold themselves round into the precise way you need to form the knot.
相反，你必须使用化学物质使分子精确地折叠起来，这需要形成结。
Instead you've got to use chemistry to make the molecules fold themselves round into the precise way you need to form the knot.
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