词典释义：
make a quick, short movement up and down
上下移动；颠簸
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I could see his ginger head bobbing about 我可以看到他姜黄色的脑袋在上下移动
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the boat bobbed up and down. 那艘船不住地颠簸。
[with obj.]cause (something) to make such a movement
使上下移动，使颠簸
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she bobbed her head .她点了点头。
[no obj., with adverbial of direction]make a sudden move in a particular direction so as to appear or disappear
突然出现（或消失）
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a lady bobbed up from beneath the counter .一位女士突然从柜台底下冒了出来。
[no obj.]move up and down briefly in a curtsy
微微鞠躬（或屈膝）行礼。
a quick, short movement up and down
抖动，颠簸
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she could only manage a slight bob of her head .她最多只能轻轻地点一下头。
a brief curtsy
屈膝礼，鞠躬礼。
a style in which the hair is cut short and evenly all round so that it hangs above the shoulders
（发型）蘑菇式，波波头。
a weight on a pendulum, plumb line, or kite-tail
钟摆，摆锤，测锤；风筝坠子。
a bobsleigh
大雪橇，连橇。
a short line at or towards the end of a stanza
诗节末尾的短行。
[with obj.][usu. as adj.
把（头发）剪成蘑菇式（或波波头）。
[no obj.]ride on a bobsleigh
乘大雪橇。
〈英， 非正式〉 （一）先令。
used with reference to a moderately large but unspecified amount of money
相当多的一笔钱
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those vases are worth a few bob .那些花瓶值不少钱哪。
a change of order in bell-ringing
变序鸣钟。
used in names of change-ringing methods
[用 于变序鸣钟各种名称]
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plain bob 普通变序鸣钟
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bob minor .小变序鸣钟。
〈英， 非正式〉 ［用 于表示做某事十分容易］ 再简单没有了
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fill in the form, and Bob's your uncle .把这表格填一填，再简单没有了。
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bob and weave make rapid bodily movements up and down and from side to side, for example as an evasive tactic by a boxer 身体左挡右闪 -
bob for apples try to catch floating or hanging apples with one's mouth alone, as a game 咬苹果游戏（用嘴巴咬住摆动或悬挂着的苹果的游戏）
" late Middle English： of unknown origin. late Middle English （denoting a bunch or cluster）： of unknown origin. late 18th cent.: of unknown origin.late 17th cent.: perhaps connected with
