The boundary condition at the pile head plays an important role in pile responses.

桩头处的边界条件在桩反应中起着重要的作用。

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Static loading test, which is expensive, is usually required for getting pile head stiffness.

为了确定桩的刚度，通常需要通过静载荷试验测取，耗资巨大。

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In mest current methods for computation of pile head stiffness, pile is supposed to be rigid.

现行桩的刚度计算大都假设桩为刚性。

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We run a tight rope daily, balancing a pile of books on the head.

VOA: special.2009.06.28

"Every August, we'd pile into the car and head to our cottage on Lake Linoleum, " Clinton says in the ad, which plays over a black and white snapshot of an astoundingly cute Clinton as a toddler, reaching for the camera.

NPR: Clinton, Obama Ad Wars Heat Up Ahead of Pa. Vote

Finding the nearest pile of sand and burying your head in it solves nothing.

FORBES: Move up http://i.forbesimg.com t Move down

Inside the two-toned elliptical head-piece are a pile of electronics, including Bluetooth, GPS, WiFi and a cellular radio.

ENGADGET