Yellow-head Twist-necked Turtle 黄头侧颈龟
conical twist drill head 锥形麻花钻头
cone twist rock-drilling head 锥螺旋凿岩钻头
He gave a shy smile and a little twist of his head.
他羞怯地笑了笑,略微扭了一下头。
Dr Neave explains that humans move in three planes. You can nod your head backwards and forwards, side to side or twist your neck to look over a shoulder.
尼夫博士解释道,人的动作三个方面你可以前后点头,左右摆头,或扭头看向肩膀。
An owl's head, for example, can twist so far round that it faces backward, but when the bird wants to look forward again, it must turn its head back the way it came.
比如说猫头鹰可以将正脸一直转到后脑勺的位置,但是如果它再想看到正前方的东西,那整个头部只能原路返回了。
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