学习资料
[意 思]n. 颤抖,抖动,颤声
[例]  There was a slight quiver in his voice as he spoke. 他说话时声音有些颤抖。
vi. 颤抖,发抖
[例]  The building quivered as the explosive went off. 当炸药爆炸时,大楼颤动不已。
vt. 使颤动,抖动(翅膀等)
[例]  The bird quivered its wings. 鸟儿抖动翅膀。