Square waves, like sine waves, are periodic.

方波如正弦波一样是周期性的。

youdao

Digital systems use signals, which are of pulse form, that is, a series of short-duration square waves.

数字系统使用信号脉冲形成的，也就是说，一系列的短周期平方波。

youdao

The shift and mnemonics for 8N-bit binary number can be achieved by the square waves from an oscillator in design.

在设计中利用了振荡源输出方波这一特性，实现了8N位二进制数的寄存及移位。

youdao

Buzzer can produce square-waves.

ENGADGET: Arduino Esplora helps you learn microcontrollers without the pesky breadboard

The rule tended to favor narrow designs with deep keels and towering masts to carry the thousands of square feet of sail needed to push the heavy boats through the waves.

FORBES: Magazine Article