You don't have to turn off phones all day long, but you should have some unbroken blocks of time when you don't take calls, so you can concentrate on your important tasks.

当然不是全天都关闭，但每天都应该有一段时间不被别人打扰，专心于自已感兴趣的、真正重要的事。

youdao

How come people have to turn off their cell phones and all our electronic devices when an airplane is about to take off?

当飞机要起飞时，人们为什么要关掉他们的手机和所有的电子设备呢？

youdao

Schools will advise pupils to turn off mobile phones or iPads in the evening to have enough sleep.

学校将建议学生在晚上关掉手机或 ipad 以获得足够的睡眠。

youdao

Airline employees and flight attendants could do without the cranky travelers who refuse to wait patiently, turn off cell phones or stay in their seats.

CNN: Air rage: Passengers 'quicker to snap'

Be present during meetings: close laptops, turn off cell phones.

FORBES: How to Eliminate Random Acts of Senseless Productivity

Many of the spectators, members of the Thai social elite, simply ignored the large signs posted all over the course instructing fans to turn off their phones, and jabbered away while players were poised over their shots.

CNN: ASIANOW - TIME Asia | Mobile Phones Frustrate Razor Sharp Tiger Woods