a dive in which the diver bends to touch the ankles before straightening out
Verb:
dive into the water bending the body at the waist at a right angle, like a jackknife
造句
用作不及物動詞(vi.)
The results show that the vehicle tends to rollover on the high friction-coefficient road, while the vehicle tends to yaw and jackknife on the low friction-coefficient road. 結果表明，重型半掛車輛在附著系數較高的良好路面上容易發生側傾失穩，而在附著系數較低的濕滑路面上則更容易發生橫擺和折疊失穩。