diff --git a/need_translate/not_ready/chapter_4/spr_btdog/spr_btdog_0.png b/need_translate/not_ready/chapter_4/spr_btdog/spr_btdog_0.png
deleted file mode 100755
index e0af200..0000000
Binary files a/need_translate/not_ready/chapter_4/spr_btdog/spr_btdog_0.png and /dev/null differ
diff --git a/need_translate/not_ready/chapter_4/spr_btdog/spr_btdog_1.png b/need_translate/not_ready/chapter_4/spr_btdog/spr_btdog_1.png
deleted file mode 100755
index 706a0f8..0000000
Binary files a/need_translate/not_ready/chapter_4/spr_btdog/spr_btdog_1.png and /dev/null differ