bob up and down

基本解釋

She proceeds to bob head up and down, moving the 1/8 portion in and out like a trashy metronome.
她開始上下移動頭，把這八分之一吞進吞出，像個壞掉了的節(jié)拍器。
Maude would bob her small yellow head up and down in a feathered frenzy. Harold would circle the table, wagging his tail and batting his eyes.
它們多想嘗一嘗啊，所以一到周五，這兩個家伙就表現(xiàn)得十分好動，莫德會快速瘋狂地頻頻上下擺動它的黃色小腦袋，哈羅德?lián)u著尾巴，圍著餐桌繞來繞去，眼睛不停地沖主人們眨著。
Bob, Jack, Hughie and Stu were hopping up and down by the front gate when Fee finally pushed Meggie out of the door.
當菲最后把麥琪推出門時，鮑勃、杰克、胡伊和斯圖在大門口急得雙腳直跳。

Neoclassical buildings that bob up and down on air currents.
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