Fix translation typo

Author: tai271828

tutorial/venv.po

@@ -8,7 +8,7 @@ msgstr ""
 "Project-Id-Version: Python 3.6 TW\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2018-06-26 18:54+0800\n"
-"PO-Revision-Date: 2018-07-12 20:50+0800\n"
+"PO-Revision-Date: 2018-07-12 20:55+0800\n"
 "Last-Translator: Adrian Liaw <adrianliaw2000@gmail.com>\n"
 "Language-Team: Chinese Traditional (http://www.transifex.com/python-tw-doc/"
 "python-36-tw/language/zh-Hant/)\n"
@@ -110,7 +110,7 @@ msgstr ""
 
 #: ../../tutorial/venv.rst:53
 msgid "Once you've created a virtual environment, you may activate it."
-msgstr "一定你建立了一個虛擬環境，你可能需要啟動他。"
+msgstr "一旦你建立了一個虛擬環境，你可能需要啟動他。"
 
 #: ../../tutorial/venv.rst:55
 msgid "On Windows, run::"