For an extended image, sa would reduce the contrast and degrade the details . 对于一个扩展的图象,球差会减少反衬度并使图象的细节模糊。
From the sa node, electrical impulses spread through the heart muscle to trigger the heartbeat . 从窦房石结出来的电脉冲传播到心脏肌肉触发心脏跳动。
This is particularly important when the conducting tissues between the sa node and the ventricles fail only from time to time . 尤其在窦房结和心房之间的传导组织有时发生故障时这点尤为重要。
An "atrially triggered" pacemaker can pick up the signals directly from the sa node and strengthen them before passing them to the ventricles . 一种“心房触发式心博器”就能从窦房结直接接收这种信号,并在传送到心房去之前还能将这种信号进行放大。
Sa : i will have an absolute straight up , please 山:我来一杯不加冰的纯伏特加。
Sa : ( to jonah ) you called the radion station 山: (对乔那)你打电话给电台了?
Genetic stability of attenuated japanese encephalitis virus sa 2基因稳定性研究
Standard twin room la sa hong feng hotel reservation 标准双人房,拉萨鸿峰宾馆预订
Sa : what possessed you to give them our address 山:你为什么把我们的地址给他们?
Temporary restricted zones on sa po road , wong tai sin 黄大仙沙浦道临时限制区