diff --git a/library/string.po b/library/string.po
index ea8969a03a..2f17e4ef4b 100644
--- a/library/string.po
+++ b/library/string.po
@@ -121,6 +121,8 @@ msgid ""
 "positional and keyword arguments. It is just a wrapper that calls :meth:"
 "`vformat`."
 msgstr ""
+"主要的 API method。它接收一個格式字串及一組任意的"
+"位置引數與關鍵字引數，是呼叫 :meth:`vformat` 的 wrapper。"
 
 #: ../../library/string.rst:98
 msgid ""