茶中含有一种叫多酚的复杂混合物。这种物质据信能帮助放松或扩张动脉，从而使血流更为平缓。

Tea has complex compounds called polyphenols which are believed to help the arteries to relax or dilate, thus enabling a smoother flow of blood.

youdao

谋求海外扩张的公司在行动之前最好能经历一次这样的洗礼。

For companies who are eyeing overseas expansion, it's far better to have one of those before you make the leap.

youdao

有些药品声称能扩张血管，但并没有明确证据表明它真的能明显地做到这一点，并使病人的生活质量上升。

Claims are made for some tablets that dilate the blood vessels but there is little evidence that they make a significant difference, enough to improve the quality of life.

youdao

So, Peter the Great, despite his dramatic expansion of the Russian empire, does not get this outlet on the Black Sea.

所以,彼得大帝,虽然为俄帝国的扩张立下汗马功劳,仍旧没能夺取黑海的入海口

耶鲁公开课 - 欧洲文明课程节选