单词bobbing
A bull can walk into a river, get attacked by piranha s , and a few minutes later only its skeleton will be bobbing in the water.
一头牛可能会走到河里，受到食人鱼的攻击，几分钟后就会看到它的骨架在水中映出的亮光了。
I closed my eyes then, and after a while the ornithologists drifted away, their pale faces bobbing up and down on the black wave of fever.
我当时闭着眼。过了片刻，那些鸟类学家逐渐离去。我发着烧，在昏睡中就觉得他们那苍白的脸在黑色浪涛里上下摆动。
As she swept over the threshold toward him, Mrs. Weasley was revealed, bobbing along in her wake, looking rather cross.
她轻快地跨过门槛朝哈利走来，这才露出了紧跟在她身后的韦斯莱夫人，她的神情显得很恼怒。
Smith rubbed condensation off the inside of a porthole and peered out at the boats bobbing up and down in the harbor.
史密斯用手抹去舷窗内的蒸气，看着港口内浮动的小船。
She left the room like an ocean-liner setting out to sea, her lapdog husband bobbing in her wake.
她大模大样地走出房间活像一艘远洋巨轮出海，而她的丈夫却像只叭儿狗似地跟在后面跳着。
She only saw a black eclipse bobbing up and down before her eyes.
她只看见一块黑影在她眼前一起一伏。
Of course, we knew it would be difficult to fight a battle with a navy bobbing about on the ocean against a shore-based fascist regime.
当然，我们知道，一支在海上漂来漂去的海军同在海岸集结法西斯政权的军队打仗，困难是无法估量的。
The cork on his fishing - line was bobbing up and down on the water.
他钩丝上的浮子在水面上下急动。
He sat up, startled by the sudden noise, and his pulse began to pound when he saw a greenish-white light bobbing slowly into the room.
他坐直了，震惊由突然的噪声，并且他的脉冲开始捣，当他看绿色白色光慢慢地浮动入屋子。
With their heads stretched out, constantly bobbing, it seriously seemed as if they were posing.
它们伸着头，不断地摆动，那认真样好像在摆姿势。