unmappable
美
英 
例句
True. Some characters lack a best-fit representation; these characters are called unmappable.
一些字符缺少最合適的表示形式;這些字符稱為無法映射的字符。
You can use the second parameter to control throwing an exception on unmappable characters.
可以使用第二個參數(shù)控制在遇到無法映射的字符時是否引發(fā)異常。