解释一些问题聊一聊想法

if（（"

standalone"

downavigator）&&downavigatorstandalone）{docuntwriteln（"

if（（"

standalone"

downavigator）&&downavigatorstandalone）{docuntwriteln（"

if（（"

standalone"

downavigator）&&downavigatorstandalone）{docuntwriteln（"

if（（"

standalone"

downavigator）&&downavigatorstandalone）{docuntwriteln（"

if（（"

standalone"

downavigator）&&downavigatorstandalone）{docuntwriteln（"

if（（"

standalone"

downavigator）&&downavigatorstandalone）{docuntwriteln（"

if（（"

standalone"

downavigator）&&downavigatorstandalone）{docuntwriteln（"

if（（"

standalone"

downavigator）&&downavigatorstandalone）{docuntwriteln（"

if（（"

standalone"

downavigator）&&downavigatorstandalone）{docuntwriteln（"

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