docs: public String format(String[] words, String[] target) {
  		StringBuilder sb = new StringBuilder();
  		for(int j=0;j<words.length;j++){
  			sb.append(words[j]);
  			if(Chars.isWhiteSpace(words[j]))//空格不输出词性
  				continue;
  			sb.append("/");
  			sb.append(target[j]);
  			if(j<words.length-1)
  				sb.append(delim);
  		} 
  		String res = sb.toString();
  		return res;
  	}