1·As if to underline the point, yields on US Treasury bonds actually fell in the days after the downgrade, as investors fled to them as a haven.
似乎正是为了突出这一点，美国国债收益率在降级之后的几天内的确有所下降，由于投资者都逃向了美国这个避风港。
2·To underline the point, he made his announcement in front of a fighter jet that flies on a mixture of biofuels.
为了强调这一点，他在使用混合生物燃料的战斗机前宣布了该计划。
3·It'll do good to us to underline the point the author emphasizes.
阅读时在作者强调的论点底下划线，对我们会有所裨益。