"1" .
.
"surface_radioactivity_content_of_209Bi"@en .
"SDN:P07::1R3TWUI7" .
"1" .
.
"" .
"SDN:P07::1R3TWUI7" .
"2018-02-12 16:53:18.0" .
"The surface called \"surface\" means the lower boundary of the atmosphere. \"Content\" indicates a quantity per unit area. \"Radioactivity\" means the number of radioactive decays of a material per second. \"Bi\" means the element \"bismuth\" and \"209Bi\" is the isotope \"bismuth-209\" with a half-life of 7.29e+20 days."@en .
.
.
"accepted"@en .
.
"SDN:P07::1R3TWUI7" .
"false" .
"2018-02-12 16:53:18.0" .
.