Veins are the vessels that transport blood from the body's tissues back to the heart. Each vein contains valves which keep blood flowing towards the heart, but not in the other direction. However, ...

Key points A 62-year-old man with hypertension and chronic renal disease presented to an emergency department with abdominal ...

简单地说，estimate 的意思是对事物的具体数值进行估算；assess 和 evaluate 是同义词，指“评定、评估”，人们常常把这两个词互换使用，但是 assess 和 evaluate 之间也有细微的区别。 我们将通过一系列例句和分析帮助大家辨析这三个词语。