adjustable bi - axle rack的用法和样例：
- T Bank in a variety of changes, halfway to pause for the "Dayton", backward net for the "setback", Duncuo time to adjust Bi direction, not to appear side-feng.
- He put his bag on the luggage rack.
- The old empty house soon went to rack and ruin.
- The back axle of the bus was broken.
- The house went to rack and ruin.