The jack can rotate in both horizontal and vertical directions in the front bearing and can swing up and down and right and left in the rear bearing.

千斤顶可在前支座内作水平、垂直两个方向转动，而在后支座内可作上下、左右摆动。

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Lie down and swing your legs up the wall so that they are straight and touching.

躺下并将你的腿放在墙上以使他们是笔直和动人。

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The centerboard can be raised to decrease displacement to allow the boat into shallower water - and it should swing up and back if it hits the bottom when sailing with it down.

当船只需要进入浅水区域时，活动龙骨板可被提起，以减小船底深度——即使不将其提起，它在船只行驶中触碰到水底时也会来回上下摆荡。

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Warren White of the Scripps Institution of Oceanography in La Jolla, California, and his colleagues were the first to find that sea-surface temperatures across the globe swing up and down in a 10-to 12-year period that lags behind the solar cycle by two to three years.

ECONOMIST: The earth��s climate

To begin, stand with knees and hips slightly bent, one end of the rope in each hand, and swing the arms up and down one at a time or simultaneously to rapidly lift and slam the rope to the floor.

WSJ: What's Your Workout: From a Ball and Basket to a Stick and Some Ice

One possibility is that the jet streams that normally hit the west coast straight on will instead swing up into Alaska and dive down the coast, bringing along cold arctic winds with it.

CNN: La Nina spawns extreme weather