1·Given that Gruber was providing this kind of technical consulting, should he have recused himself entirely from the public debate?
既然格鲁伯在提供这类技术咨询，那么，他是否应该完全回避公共辩论？
2·Gruber has spent years developing such a model, which is maintained and update at considerable expense.
格鲁伯已花费数年建立这样一个模型，它的维持和更新都花费了相当大的代价。