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https:\/\/www.ams.org\/publicoutreach\/feature-column\/fc-2018-05<\/a> ","protected":false},"excerpt":{"rendered":"","protected":false},"author":17897162,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_geoff_meta_description_en":"A half-twist joins the two apparent faces of a paper strip into one continuous surface, which a pencil line can traverse without crossing an edge.","_geoff_meta_description_zh":"\u628a\u7eb8\u5e26\u626d\u534a\u5708\u540e\u9996\u5c3e\u7c98\u5408\uff0c\u4f1a\u5f97\u5230\u53ea\u6709\u4e00\u4e2a\u8fde\u7eed\u9762\u7684\u83ab\u6bd4\u4e4c\u65af\u5e26\uff1b\u94c5\u7b14\u6cbf\u4e2d\u7ebf\u4e0d\u65ad\u524d\u8fdb\uff0c\u6700\u7ec8\u4f1a\u56de\u5230\u8d77\u70b9\u800c\u6ca1\u6709\u8de8\u8fc7\u8fb9\u7f18\uff0c\u63ed\u793a\u5f62\u72b6\u53d6\u51b3\u4e8e\u6574\u4f53\u8fde\u63a5\u65b9\u5f0f\u3002","_wpcom_ai_launchpad_first_post":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[787297218],"tags":[787299546,787299545,787299547,787299548],"class_list":["post-19344","post","type-post","status-publish","format-standard","hentry","category-daily-maths-physics-chemistry","tag-mobius-strip-zh","tag-mobius-strip","tag-topology","tag-topology-zh",""],"translatepress_titles":{"en_AU":"Why Does a Half-Twisted Paper Loop Have Only One Side?","zh_CN":"\u7eb8\u5e26\u626d\u534a\u5708\u518d\u7c98\u4e0a\uff0c\u4e3a\u4ec0\u4e48\u53ea\u5269\u4e00\u4e2a\u9762\uff1f"},"jetpack_publicize_connections":[],"jetpack_likes_enabled":false,"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p1ar9H-520","jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/geoffreychen.com\/zh\/wp-json\/wp\/v2\/posts\/19344","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/geoffreychen.com\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/geoffreychen.com\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/geoffreychen.com\/zh\/wp-json\/wp\/v2\/users\/17897162"}],"replies":[{"embeddable":true,"href":"https:\/\/geoffreychen.com\/zh\/wp-json\/wp\/v2\/comments?post=19344"}],"version-history":[{"count":0,"href":"https:\/\/geoffreychen.com\/zh\/wp-json\/wp\/v2\/posts\/19344\/revisions"}],"wp:attachment":[{"href":"https:\/\/geoffreychen.com\/zh\/wp-json\/wp\/v2\/media?parent=19344"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/geoffreychen.com\/zh\/wp-json\/wp\/v2\/categories?post=19344"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/geoffreychen.com\/zh\/wp-json\/wp\/v2\/tags?post=19344"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
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