[po] auto sync bot

zhsj · zhsj · commit 0610163ea7e5 · 2018-11-29T15:15:45.000+08:00
diff --git a/reference/datamodel.po b/reference/datamodel.po
@@ -2996,6 +2996,9 @@ msgid ""
 ":exc:`!OverflowError` by truth value testing, an object must define a "
 ":meth:`__bool__` method."
 msgstr ""
+"在 CPython 中，要求长度最大为 :attr:`sys.maxsize`。如果长度大于 :attr:`!sys.maxsize` 则某些特性 "
+"(例如 :func:`len`) 可能会引发 :exc:`OverflowError`。要通过真值检测来防止引发 "
+":exc:`!OverflowError`，对象必须定义 :meth:`__bool__` 方法。"
 
 #: ../../reference/datamodel.rst:2142
 msgid ""
@@ -3004,20 +3007,22 @@ msgid ""
 "length). The length must be an integer ``>=`` 0. This method is purely an "
 "optimization and is never required for correctness."
 msgstr ""
+"调用此方法以实现 :func:`operator.length_hint`。应该返回对象长度的估计值（可能大于或小于实际长度）。此长度应为一个 "
+"``>=`` 的整数。此方法纯粹是为了优化性能，并不要求正确无误。"
 
 #: ../../reference/datamodel.rst:2152
 msgid ""
 "Slicing is done exclusively with the following three methods.  A call like "
 "::"
-msgstr ""
+msgstr "切片是通过下述三个专门方法完成的。以下形式的调用 ::"
 
 #: ../../reference/datamodel.rst:2156
 msgid "is translated to ::"
-msgstr ""
+msgstr "会为转写为 ::"
 
 #: ../../reference/datamodel.rst:2160
 msgid "and so forth.  Missing slice items are always filled in with ``None``."
-msgstr ""
+msgstr "其他形式以此类推。略去的切片项总是以 ``None`` 补全。"
 
 #: ../../reference/datamodel.rst:2167
 msgid ""
