diff --git a/library/io.po b/library/io.po
index c190abe473..d8f43c3f63 100644
--- a/library/io.po
+++ b/library/io.po
@@ -593,6 +593,10 @@ msgid ""
 "raise a :exc:`ValueError` (or :exc:`UnsupportedOperation`) when operations "
 "they do not support are called."
 msgstr ""
+"即使 :class:`IOBase` 因為實作的簽名差異巨大而沒有宣告 :meth:`!read` 或 :meth:"
+"`!write` 方法，實作與用戶端應把這些方法視為介面的一部份。此外，當呼叫不被它們"
+"支援的操作時，可能會引發 :exc:`ValueError` （或 :exc:`UnsupportedOperation`）"
+"例外。"
 
 #: ../../library/io.rst:329
 msgid ""
@@ -606,6 +610,8 @@ msgid ""
 "Note that calling any method (even inquiries) on a closed stream is "
 "undefined.  Implementations may raise :exc:`ValueError` in this case."
 msgstr ""
+"請注意，在一個已經關閉的串流上呼叫任何方法（即使只是查詢）都是未定義的。在這"
+"種情況下，實作可能會引發 :exc:`ValueError` 例外。"
 
 #: ../../library/io.rst:336
 msgid ""
@@ -622,10 +628,12 @@ msgid ""
 "keyword:`with` statement.  In this example, *file* is closed after the :"
 "keyword:`!with` statement's suite is finished---even if an exception occurs::"
 msgstr ""
+":class:`IOBase` 也是個情境管理器，因此支援 :keyword:`with` 陳述式。在這個例子"
+"中，*file* 會在 :keyword:`!with` 陳述式執行完畢後關閉——即使發生了異常。"
 
 #: ../../library/io.rst:349
 msgid ":class:`IOBase` provides these data attributes and methods:"
-msgstr ""
+msgstr ":class:`IOBase` 提供這些資料屬性與方法："
 
 #: ../../library/io.rst:353
 msgid ""
@@ -633,12 +641,14 @@ msgid ""
 "already closed. Once the file is closed, any operation on the file (e.g. "
 "reading or writing) will raise a :exc:`ValueError`."
 msgstr ""
+"清除並關閉這個串流。若檔案已經關閉，則此方法沒有作用。一旦檔案被關閉，任何對"
+"檔案的操作（例如讀取或寫入）將引發 :exc:`ValueError` 異常。"
 
 #: ../../library/io.rst:357
 msgid ""
 "As a convenience, it is allowed to call this method more than once; only the "
 "first call, however, will have an effect."
-msgstr ""
+msgstr "為了方便起見，允許多次呼叫這個方法；然而，只有第一次呼叫會有效果。"
 
 #: ../../library/io.rst:362
 msgid "``True`` if the stream is closed."