diff --git a/library/datetime.po b/library/datetime.po
index ae13bec8e3..0500a02b29 100644
--- a/library/datetime.po
+++ b/library/datetime.po
@@ -1122,6 +1122,9 @@ msgid ""
 "going through a :func:`time.time` timestamp (for example, this may be "
 "possible on platforms supplying the C :c:func:`gettimeofday` function)."
 msgstr ""
+"如果選用的引數 *tz* 為 ``None`` 或未指定，則會像是 :meth:`today`，但盡可能提"
+"供比透過 :func:`time.time` 取得的時間戳記更多位數的資訊（例如，這在有提供 C "
+":c:func:`gettimeofday` 函式的平台上可能可行）。"
 
 #: ../../library/datetime.rst:878
 msgid ""