[po] auto sync bot

zhsj · zhsj · commit 6a3ce7f3e30d · 2018-08-11T23:28:01.000+08:00
diff --git a/tutorial/datastructures.po b/tutorial/datastructures.po
@@ -540,12 +540,14 @@ msgid ""
 "mutable objects like lists.  All comparison operators have the same "
 "priority, which is lower than that of all numerical operators."
 msgstr ""
+"比较操作符 ``in`` 和 ``not in`` 校验一个至是否在（或不在）一个序列里。操作符 ``is`` 和 ``is not`` "
+"比较两个对象是不是同一个对象，这只跟像列表这样的可变对象有关。所有的比较操作符都有相同的优先级，且这个优先级比数值运算符低。"
 
 #: ../../tutorial/datastructures.rst:646
 msgid ""
 "Comparisons can be chained.  For example, ``a < b == c`` tests whether ``a``"
 " is less than ``b`` and moreover ``b`` equals ``c``."
-msgstr ""
+msgstr "比较操作可以传递。例如 ``a < b == c``校验是否 ``a`` 小于 ``b`` 并且 ``b`` 等于 ``c``。"
 
 #: ../../tutorial/datastructures.rst:649
 msgid ""
@@ -556,6 +558,9 @@ msgid ""
 "lowest, so that ``A and not B or C`` is equivalent to ``(A and (not B)) or "
 "C``. As always, parentheses can be used to express the desired composition."
 msgstr ""
+"比较操作可以通过逻辑运算符 ``and`` 和 ``or`` 来组合，并且比较操作（或其他任何逻辑运算）的结果都可以用 ``not`` "
+"来取反义。这些操作符的优先级又低于比较操作符。在它们之中，``not`` 优先级最高， ``or``优先级最低，因此 ``A and not B or "
+"C`` 等价于 ``(A and (not B)) or C``。一如既往，你也可以在这种式子里使用圆括号。"
 
 #: ../../tutorial/datastructures.rst:656
 msgid ""
@@ -566,12 +571,15 @@ msgid ""
 "expression ``C``.  When used as a general value and not as a Boolean, the "
 "return value of a short-circuit operator is the last evaluated argument."
 msgstr ""
+"逻辑运算符 ``and`` 和 ``or`` 也被成为 *短路* 运算符：它们的参数从左至右解析，一旦可以确定结果解析就会停止。例如，如果 ``A`` "
+"和 ``C`` 为真而 ``B`` 为假，那么 ``A and B and C `` 不会解析 "
+"``C``。当作用于普通值而非逻辑值时，短路操作符的返回值通常是最后一个变量。"
 
 #: ../../tutorial/datastructures.rst:663
 msgid ""
 "It is possible to assign the result of a comparison or other Boolean "
 "expression to a variable.  For example, ::"
-msgstr ""
+msgstr "也可以把比较操作或者逻辑表达式的结果赋值给一个变量，例如 ::"
 
 #: ../../tutorial/datastructures.rst:671
 msgid ""
@@ -580,6 +588,8 @@ msgid ""
 "problems encountered in C programs: typing ``=`` in an expression when "
 "``==`` was intended."
 msgstr ""
+"注意 Python 与 C 不同，赋值操作不能发生在表达式内部。C程序员可能会对此抱怨，但它避免了一类C程序中常见的错误：想在表达式中写 ``==`` "
+"时却写成了 ``=``。"
 
 #: ../../tutorial/datastructures.rst:680
 msgid "Comparing Sequences and Other Types"
