out of true wheel 失圆的车轮
run out of true 偏离真值
straight out of true 笔直
true circle 真圆
circular error 圆度误差
1. The wheel of the old tractor is out of true, so it vibrates when we drive it.
老拖拉机的轮子不圆，所以开起来会震动。
2. After the accident, the rim was bent and became out of true.
事故发生后，轮辋变形，不再保持正圆。
3. The machinist adjusted the shaft until it was no longer out of true.
机械师调整了轴，直到它不再偏心。
A: Why does the bicycle wheel wobble so much? A：为什么自行车轮子摇得这么厉害？ B: It is because the tire is out of true. I need to fix it. B：因为轮胎不圆了，我需要修一下。
1) 不圆的（指车轮、圆盘等）
2) 不直的（指长条物体）
3) 偏心的（机械术语）
1. （物体）不圆，不直，不正
e.g. The wheel is slightly out of true. 这个轮子有点不圆。
adjective
1. Not round, straight, or true; out of alignment or shape, especially referring to wheels or shafts.
Synonym: misaligned, distorted