他们利用水压使腿像活塞一样，可以弹跳到30倍于他们体长的高度。
They use hydraulic pressure to work their legs like pistons, catapulting up to 30 times their own body length.
塑料活塞环结构参量的设计是在缸径为已知量的前题下，分别对活塞环厚度、活塞环轴向高度、活塞环线胀量等进行设计。
The parameter design of the plastic piston ring refers to designing the piston ring thickness, piston ring axial height and piston ring linear expansion in case that the cylinder bore is known.
大量粒子的这种不断撞击，反抗着作用在活塞与重物上的向下作用的重力，因而能使活塞保持在某个高度上。
This continual bombardment by a great number of particles keeps the piston at a certain height by opposing the force of gravity acting downward on the piston and the weights.
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