医用超声诊断设备中存在两种声束形成技术。
There are two beamforming techniques in the medical ultrasound diagnostic equipment.
用该种方法可以同时激发出传播方向相反的两束声。
Two ultrasonic beams in opposite direction can be excited simultaneously.
尽管玩笑或祝愿有时仅仅只是一声“你好”——那样简单，它却象一束来自天际的暖阳！
That little joke or note, or just a simple "hi", Could be like a ray of sunshine from the sky!
尽管玩笑或祝愿有时仅仅只是一声“你好”——那样简单，它却象一束来自天际的暖阳！
That little joke or note, or just a simple "hi", Could be like a ray of sunshine from the sky!
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