2. He says
lowering medical cost is the most important thing he can do to ensure a healthy domestic economy.
他说降低医疗成本是他能做的最重要的事情,这样才能确保一个健康的国内经济。
3. Their paper reveals that there is much more to eliciting a nod than simply
lowering the pitch of the voice and pausing.
他们的论文揭示出引起点头的因素还有很多,并不简单只是音调的降低或者说话的停顿。