与水平安定面相连的是两个称为 “ 升降舵 ” 的可动操纵面.Attached to the stabilizers are two movable surface called " elevator ".俯仰力矩的变化由升降舵的偏转来提供.A variable pitching moment is provided by moving the elevator.飞机的升降舵可以使它升降自如.The elevator of an airc...
他们占用了塔楼的头两层。They occupied the first two floors of the tower.这些塔楼是钢结构，花岗岩贴面。The towers are made of steel cased in granite.塔楼上的钟当当地敲响了。Bells were clanging in the tower....