... substitute[sbstitjut] n. 替代品;代用品 swing up and down 上下浮动 with reference to 参考;参照 ...
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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。
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。
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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