Your SA node sends out the electrical signal that guides the rest of the heart tissue.

你的窦房结发出的电信号会指导心脏的其他组织。

Sato: If any electrical signal remains in a pixel, image quality will be reduced.

佐藤：如果有任何一点电信号残存在象素中，那么图像质量将会下降。

During atrial fibrillation, the electrical signal that causes your heart to beat becomes uncoordinated.

房颤时，心脏的电脉冲变得不协调。

Now, another type of electrical signal, which is becoming common, is the digital or discrete signal.

当今，另一种电信号形式变得越来越常用，就是数字或者是离散信号。

Infrared transducer examines directly the body and sends out electrical signal similar to sine wave.

红外传感器直接感应人体，并输出近似正弦波的电信号。