Translate library/datetime.rst:124 (#543)

* Translate library/datetime.rst:124

* Apply suggestions from code review

Co-authored-by: RockLeon <[email protected]>

* Update datetime.po

* Update datetime.po

---------

Co-authored-by: RockLeon <[email protected]>

Author: 933yee

library/datetime.po

@@ -176,6 +176,8 @@ msgid ""
 "A duration expressing the difference between two :class:`date`, :class:`."
 "time`, or :class:`.datetime` instances to microsecond resolution."
 msgstr ""
+"表示兩個 :class:`date`、:class:`.time` 或 :class:`.datetime` 實例之間時間的差"
+"異，以微秒為解析度。"
 
 #: ../../library/datetime.rst:131
 msgid ""