This sleek design allows single sounds to convey useful information, and in fact, even the absence of a sound has been enlisted to express something specific.

这种圆滑的设计使单一的声音也能传达有用的信息，事实上，即使没有声音也会被用来表达一些特定的含义。

youdao

The Shakers believed that furniture should be plain, simple, useful, practical, and of sound construction.

震颤派教徒认为家具应当朴素、简单、有用、实际，且构造很好。

《柯林斯英汉双解大词典》

While such items sound useful, they're actually expensive to sort, to transport and to distribute, she said.

虽然这些东西听起来很有用，但在分类、运输和分发上他们却非常昂贵，她说。

youdao

The Senator recommended instead the time-tested policy of "peace through strength, " complemented where useful with sound, verifiable arms control agreements.

CENTERFORSECURITYPOLICY: Center For Security Policy

Just press and hold a button on the remote control and the My Beam function will instantly "beam" the sound in your direction -- useful for the hard-of-hearing or late-night movie fests while the rest of the household slumbers.

ENGADGET: Yamaha's YSP-900 Digital Sound Projector: a 5.1 sound bouncer that works

The video quality means the Q2HD will likely never be your main camera, but it adds useful extra functionality when you want more than just sound.

ENGADGET: Zoom Q2HD Handy Video Recorder lets you stream and record on the move, we go hands-on