In medical Doppler ultrasound systems, a high-pass filter is usually employed to remove wall clutter components which may also remove the information of the low velocity blood flow.

医学超声多普勒系统的高通滤波器在消除血管壁搏动带来的回波干扰时，也滤除了低速血流信息。

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High winds can get under the frisbee and change its direction, making it difficult for team members to pass.

大风可以压低飞盘，改变其方向，使得队员难以传递。

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Both elementary and high school students in Massachusetts must pass a series of standardized tests throughout their studies.

马萨诸塞州小学和高中的学生在学习生涯中都必须通过一系列标准化测试。

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However, Darlington did not have to wait long for their second goal, Hodgson again involved with a high-quality pass converted by on-loan Newcastle striker Richard Offiong.

BBC: Darlington 4-1 Stevenage

This involves crossing a 4, 700-metre-high pass on a donkey, and is impossible in winter.

ECONOMIST: Postcard from Faizabad

In fact, there's little of note in this utilitarian area, though those low-to-high pass filter controls are definitely a welcome addition.

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