Exercise dilates blood vessels on the surface of the brain.运动会使大脑表层的血管扩张。Standard measurements of blood pressure are an important but crude way of assessing the risk of heart disease or strokes...标准的血压测量是评估患心脏病或中风几率的一个重要...
They retrenched by eliminating half the workers.他们把人员减半以减少支出.Third, the dynamics of setting deadlines for eliminating pollution have been reinforced.三是加大了污染限期治理的力度.Science advances both by finding out what is true and by...