press-button switch

基本解释

Turn this knob to the left then this other knob to the right, press the red button, switch on-and Bob's your uncle.
先将这个旋钮往左拧，然后再将这另一个向右拧，接着按下红色的按钮，再打开开关—这就完事了。
Plug in the included laptop-like power supply, connect laser and laser driver, activate the key switch and press the "ON" button.
插上像笔记本一样的电源，连接激光器和激光器驱动，启动开关并按下“ON”按键。
It's quite simple, really. Turn this kti}b to the right, then this other knob to the right, press the red button, switch on--and Bab's your uncle.
这机器实际操作起来相当容易：先向右转动这个旋扭，再向右转动另一个旋妞，按那个红色的按妞，推上开关，就成了！

It goes where a built-in webcam can't, and with one press of a button, it's easy to switch between your built-in webcam and the Logitech Broadcaster Wi-Fi Webcam, so your friends and audience can enjoy a standard view or move around the room with you.
ENGADGET: Logitech announces $200 Broadcaster WiFi webcam for iPhone, iPad and Mac (video)