It causes blindness or serious loss of vision
这能导致失明或视力严重受损。
Blindness is a common complication of diabetes
失明是糖尿病常见的并发症。
Excuse me for my bluntness.
恕我唐突。
I marvelled at your boldness.
我对你的大胆感到惊奇。
Boldness means a decision to bite off more than you are sure you can eat.
大胆意味着决定去尝试自己能力范围之外的东西。