docs: private Predict<String> estimateActions(JointParsingState state) {
  		// 当前状态的特征
  		ArrayList<String> features = state.getFeatures();
  		Instance inst = new Instance(addFeature(fa, features, ysize));
  
  		Predict<Integer> ret = models.classify(inst,ysize);
  		ret.normalize();
  		Predict<String> result =new Predict<String>(2);
  		float total = 0;
  		for (int i = 0; i < 2; i++) {
  			Integer guess = ret.getLabel(i);
  			if(guess==null) //bug：可能为空，待修改。 xpqiu
  				break;
  			String action = la.lookupString(guess);
  			result.add(action,ret.getScore(i));	
  		}
  
  
  		return result;
  	}