Maybe you added extra line breaks?
I don't see any in http://radioscanningtw.jidanni.org/robots.txt
Some crawlers adhere to their published syntax extensions, e.g., http://www.google.com/bot.html .
Some crawlers' URLs mention extensions, but then those crawlers don't seem to even follow the vanilla robots.txt standard.
Some crawlers' URLs don't mention any extensions, saying that they just use the vanilla robots.txt standard. But then some don't seem to adhere to what they just said.