Translate a part of tutorial/floatingpoint

yichung279 · adrianliaw · commit 592ccd1de7fe · 2018-11-07T17:28:27.000+08:00
See #51 for the full PR revision history
diff --git a/tutorial/floatingpoint.po b/tutorial/floatingpoint.po
@@ -8,7 +8,7 @@ msgstr ""
 "Project-Id-Version: Python 3.7\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2018-06-26 18:54+0800\n"
-"PO-Revision-Date: 2016-11-19 00:37+0000\n"
+"PO-Revision-Date: 2018-11-07 16:57+0800\n"
 "Last-Translator: Liang-Bo Wang <me@liang2.tw>\n"
 "Language-Team: Chinese - TAIWAN (https://github.com/python/python-docs-zh-"
 "tw)\n"
@@ -81,6 +81,10 @@ msgid ""
 "fraction is ``3602879701896397 / 2 ** 55`` which is close to but not exactly "
 "equal to the true value of 1/10."
 msgstr ""
+"只要您停在任何有限的位數，您就只會得到近似值。而現在大多數的計算機中，浮點數"
+"是透過二進位分數近似的，其中分子從最高有效位元使開始用 53 個位元表示，分母則"
+"是以二為底的指數。在 1/10 的例子中，二進位分數為 ``3602879701896397 / 2 ** "
+"55``，而這樣的表示十分地接近，但不完全等同於 1/10 的真正數值。"
 
 #: ../../tutorial/floatingpoint.rst:62
 msgid ""
@@ -90,18 +94,30 @@ msgid ""
 "if Python were to print the true decimal value of the binary approximation "
 "stored for 0.1, it would have to display ::"
 msgstr ""
+"由於數值顯示的方式，很多使用者並沒有發現數值是個近似值。Python 只會印出一個十"
+"進位近似值，其近似了儲存在計算機中的二進位近似值的十進位數值。在大多數的計算"
+"機中，如果 Python 真的會印出完整的十進位數值，其表示儲存在計算機中的 0.1 的二"
+"進位近似值，它將顯示為：\n"
+"\n"
+"::"
 
 #: ../../tutorial/floatingpoint.rst:71
 msgid ""
 "That is more digits than most people find useful, so Python keeps the number "
 "of digits manageable by displaying a rounded value instead ::"
 msgstr ""
+"這比一般人感到有用的位數還多，所以 Python 將位數保持在可以接受的範圍，只顯示"
+"捨入後的數值：\n"
+"\n"
+"::"
 
 #: ../../tutorial/floatingpoint.rst:77
 msgid ""
 "Just remember, even though the printed result looks like the exact value of "
 "1/10, the actual stored value is the nearest representable binary fraction."
 msgstr ""
+"一定要記住，雖然印出的數字看起來是精準的 1/10，但真正儲存的數值是能表示的二進"
+"位分數中，最接近精準數值的數。"
 
 #: ../../tutorial/floatingpoint.rst:80
 msgid ""
@@ -113,6 +129,11 @@ msgid ""
 "values share the same approximation, any one of them could be displayed "
 "while still preserving the invariant ``eval(repr(x)) == x``."
 msgstr ""
+"有趣的是，有許多不同的十進位數，共用同一個最接近的二進位近似小數。例如說：數"
+"字 ``0.1`` 和 ``0.10000000000000001`` 和 "
+"``0.1000000000000000055511151231257827021181583404541015625``，都由 "
+"``3602879701896397 / 2 ** 55`` 近似。由於這三個數值共用同一個近似值，任何一個"
+"數值都可以被顯示，同時保持 ``eval(repr(x)) == x``。"
 
 #: ../../tutorial/floatingpoint.rst:88
 msgid ""
@@ -121,6 +142,9 @@ msgid ""
 "Starting with Python 3.1, Python (on most systems) is now able to choose the "
 "shortest of these and simply display ``0.1``."
 msgstr ""
+"歷史上，Python 的提示字元 (prompt) 與內建的 :func:`repr` 函式會選擇上段說明中"
+"有 17 個有效位元的數：``0.10000000000000001``。從 Python 3.1 版開始，"
+"Python（在大部分的系統上）可以選擇其中最短的數並簡單地顯示為 ``0.1``。"
 
 #: ../../tutorial/floatingpoint.rst:93
 msgid ""
@@ -130,12 +154,19 @@ msgid ""
 "arithmetic (although some languages may not *display* the difference by "
 "default, or in all output modes)."
 msgstr ""
+"注意，這是二進位浮點數理所當然的特性，並不是 Python 的錯誤 (bug)，更不是您程"
+"式碼的錯誤。只要有程式語言支持硬體的浮點數運算，您將會看到同樣的事情出現在其"
+"中（雖然某些程式語言預設不\\ *顯示*\\ 差異，或者預設全部輸出）。"
 
 #: ../../tutorial/floatingpoint.rst:99
 msgid ""
 "For more pleasant output, you may wish to use string formatting to produce a "
 "limited number of significant digits::"
 msgstr ""
+"為求更優雅的輸出，您可能想要使用字串的格式化 (string formatting) 產生限定的有"
+"效位數：\n"
+"\n"
+"::"
 
 #: ../../tutorial/floatingpoint.rst:111
 msgid ""
