diff --git a/po/zh_CN.po b/po/zh_CN.po
index 5828142af..879af43ef 100644
--- a/po/zh_CN.po
+++ b/po/zh_CN.po
@@ -7,7 +7,7 @@ msgstr ""
 "Project-Id-Version: mkvtoolnix\n"
 "Report-Msgid-Bugs-To: Moritz Bunkus <moritz@bunkus.org>\n"
 "POT-Creation-Date: 2018-06-10 20:05+0200\n"
-"PO-Revision-Date: 2018-04-11 16:43+0000\n"
+"PO-Revision-Date: 2018-06-10 19:09+0000\n"
 "Last-Translator: Dian Li <xslidian@gmail.com>\n"
 "Language-Team: Chinese (China) (http://www.transifex.com/moritz-bunkus/mkvtoolnix/language/zh_CN/)\n"
 "Language: zh\n"
@@ -2651,7 +2651,7 @@ msgstr "AV1"
 
 #: src/common/file_types.cpp:52
 msgid "AV1 Open Bitstream Units stream"
-msgstr ""
+msgstr "AV1 开放码流单元（OBU）流"
 
 #: src/common/file_types.cpp:76
 #: src/output/p_avc.h:34
@@ -4991,9 +4991,8 @@ msgid "Elements in the category '%1%' ('--edit %2%'):\n"
 msgstr "类别 '%1%' 中的元素 ('--edit %2%'): \n"
 
 #: src/mkvtoolnix-gui/forms/main_window/preferences_dialog.h:1570
-#, fuzzy
 msgid "Enable copying of items by their type"
-msgstr "按类型选中要复制的轨道"
+msgstr "按类型选中要复制的项目"
 
 #: src/mkvtoolnix-gui/forms/main_window/preferences_dialog.h:1571
 msgid "Enable copying of tracks by their language"
@@ -5010,7 +5009,7 @@ msgstr "启用"
 #: src/mkvtoolnix-gui/merge/additional_command_line_options_dialog.cpp:88
 #, no-c-format
 msgid "Enables AV1 video support even though the AV1 bitstream specification hasn't been finalized yet."
-msgstr ""
+msgstr "启用 AV1 视频支持，即使 AV1 码流规范尚未定稿。"
 
 #: src/mkvtoolnix-gui/merge/output.cpp:155
 #, no-c-format
@@ -5018,9 +5017,9 @@ msgid "Enables splitting of the output into more than one file."
 msgstr "将输出文件分割为一个以上的文件。"
 
 #: src/mkvtoolnix-gui/main_window/preferences_dialog.cpp:192
-#, fuzzy, no-c-format
+#, no-c-format
 msgid "Enabling items"
-msgstr "启用轨道"
+msgstr "选中项目"
 
 #: src/mkvtoolnix-gui/merge/additional_command_line_options_dialog.cpp:84
 #, no-c-format
@@ -6296,7 +6295,7 @@ msgstr "'--default-track %1%' 中指定的布尔值无效。\n"
 #: src/merge/mkvmerge.cpp:1629
 #, boost-format
 msgid "Invalid boolean option specified in '--fix-bitstream-timing-information %1%'.\n"
-msgstr "“--fix-bitstream-timing-information %1%”中指定的布尔值无效。\n"
+msgstr "「--fix-bitstream-timing-information %1%」中指定的布尔值无效。\n"
 
 #: src/merge/mkvmerge.cpp:1277
 #, boost-format
@@ -6596,7 +6595,7 @@ msgstr "'--default-track %1%' 中指定的轨道 ID 无效。\n"
 #: src/merge/mkvmerge.cpp:1623
 #, boost-format
 msgid "Invalid track ID specified in '--fix-bitstream-timing-information %1%'.\n"
-msgstr "“--fix-bitstream-timing-information %1%”中指定的轨道 ID 无效。\n"
+msgstr "「--fix-bitstream-timing-information %1%」中指定的轨道 ID 无效。\n"
 
 #: src/merge/mkvmerge.cpp:1271
 #, boost-format
@@ -7726,9 +7725,9 @@ msgid "Only if the source doesn't contain a language"
 msgstr "仅当输入文件中不含语言信息时"
 
 #: src/mkvtoolnix-gui/main_window/preferences_dialog.cpp:393
-#, fuzzy, no-c-format
+#, no-c-format
 msgid "Only items whose type is in the 'selected' list on the right will be set to be copied by default."
-msgstr "只有右侧「选中」列表范围内类型的轨道会默认选中用于复制。"
+msgstr "只有右侧「选中」列表范围内类型的项目会默认选中用于复制。"
 
 #: src/mkvtoolnix-gui/merge/input.cpp:514
 #, no-c-format
@@ -7805,7 +7804,7 @@ msgstr "只支持 v7 和更高版本的 VobSub 文件。如果您的文件是旧
 
 #: src/common/file_types.cpp:96
 msgid "Open Bitstream Units stream"
-msgstr ""
+msgstr "开放码流单元（OBU）流"
 
 #: src/mkvtoolnix-gui/header_editor/tool.cpp:162
 #: src/mkvtoolnix-gui/info/tool.cpp:126
@@ -9486,7 +9485,7 @@ msgstr "字幕"
 
 #: src/output/p_av1.cpp:29
 msgid "Support for AV1 is currently experimental and must be enabled with '--engage enable_av1' as the AV1 bitstream specification hasn't been finalized yet.\n"
-msgstr ""
+msgstr "对 AV1 的支持尚处于实验阶段，需要通过开关「--engage enable_av1」启用方可使用，因为 AV1 码流规范尚未最终定稿。\n"
 
 #: src/mkvtoolnix-gui/chapter_editor/tab.cpp:702
 #: src/mkvtoolnix-gui/chapter_editor/tool.cpp:181