One day Jack went to the park. He looked at all the things he could do. He looked at the swing. Wow! What a big swing!
一天杰克去公园了。他看着他能做的一切。他看着摇摆。哇！一个大秋千！
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。
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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