螺栓: bolt; screw bolt; threaded bolt 短语和例子连接螺栓 binder bolt; connecting bolt; 地脚螺栓 foundation bolt; 螺栓保险 bolt-lock; 螺栓柄 grip of bolt
舵: 名词(船、飞机等控制方向的装置) rudder; helm 短语和例子倒车舵 flank rudder; 方向[垂直] 舵 vertical rudder; 空气动力舵 aerodynamic rudder; 平衡舵 balanced rudder; 升降舵 elevating rudder; 掌舵 take [be at] the helm; 回舵! ease the h
首: Ⅰ名词1.(头) head 短语和例子昂首 hold one's head high; 搔首 scratch one's head2.(首领) leader; head; chief 短语和例子匪首 bandit chieftain; 祸首 chief culprit; 为首 with sb. as the leader3.(表示方位) aspect 短语和例子下首 rig
