Translate remaining string in tutorial/datastructures.po

Author: mattwang44

tutorial/datastructures.po

@@ -857,7 +857,7 @@ msgstr ""
 msgid ""
 "Because sets are unordered, iterating over them or printing them can produce "
 "the elements in a different order than you expect."
-msgstr ""
+msgstr "因為 set 是無序的，疊代或印出它們時，元素的順序可能與你預期的不同。"
 
 #: ../../tutorial/datastructures.rst:460
 msgid "Here is a brief demonstration::"