This paper reports a 31 bit low frequency SAW programmable tapped delay line. It is a key device in signal processing of interference free spread spectrum communication system.

文章报道的31位声表面波低频可程序抽头延迟线是一种用于扩频抗干扰通信系统所用的关键信号处理器件。

youdao

The size of the shrubs has increased and shrub cover has spread to what was previously shrub-free tundra.

灌木的大小增加了，以及灌木的覆盖范围扩展到以前没有灌木的苔原上。

youdao

Simple acts of kindness like a free haircut will spread.

像免费理发这样简单的善举会传播开来。

youdao

"We are working with our partners to stop the spread of nuclear weapons and to seek a world free of nuclear weapons.

VOA: standard.2010.02.06

In a further effort to spread the safe sex message, hotel guests in Papua New Guinea will soon find complimentary condoms alongside the free soap and shampoo in their rooms.

VOA: standard.2009.04.04

Word spread about the free classes. And as more students showed up, Nesser enlisted volunteers, hired a small bus and used her own money to turn her house into a school.

VOA: standard.2010.02.24

And then among the shrubs, hundreds of free bodies spread out, picnicking and sunning.

WSJ: My Foreign-Exchange Family, the Nudists

They figured some were absorbed by plants, some by animals, some by water and a large portion would float free and spread themselves all around the globe in a pattern so predictable that (this is the fun part) if you take a deep breath right now, at least one of the molecules entering your lungs literally came from Caesar's last breath.

NPR: Commemorate Caesar: Take a Deep Breath!

Spotify created a huge demand for its free service, spread by word of mouth, in its first six months of its launch, but rapidly applied the tourniquet and steered users to paid-for packages ranging from 99p for a day to a tenner a month.

FORBES: Spotify, Royalties and as Always, Who Gets the Money