bound¹ ◙ verb 1. [noobj., with adverbial of direction] walk or run with leaping strides • 跳动，跳跃着前进 »Louis came bounding down the stairs. 路易斯蹦蹦跳跳地下了楼。 »shares bounded ahead in early dealing. 在早先的交易中，股票价格振荡盘升。 (of an object, typically a round one) rebound from a surface • （物体，尤指圆形的）弹回，弹开，反跃 »bullets bounded off the veranda. 子弹打在走廊上弹了回去。 ◙ noun 1. a leaping movement upwards, typically towards or over something • 跳跃，（尤指跃向，跃过） »I went up the steps in two effortless bounds. 我没费一点力气，两下就跳上了台阶。
【语源】
1. early 16th cent. (as a noun): from French bond (noun), bondir (verb) 'resound', later 'rebound', from late Latin bombitare, from Latin bombus 'humming'bound² ◙ noun 1. [常作 bounds] a territorial limit; a boundary • 界限，边界 »the ancient bounds of the forest. 森林的原始边界。 a limitation or restriction on feeling or action • 限制，限制范围 »it is not beyond the bounds of possibility that the issue could arise again. 再次出现这件事不是不可能。 »enthusiasm to join the union knew no bounds. 人们加入该联盟的热情无限高涨。 (technical)a limiting value • [技] 界 ◙ verb 1. [with obj.] [一般作 be bounded] form the boundary of;enclose • 形成界限；关，围入 »the ground was bounded by a main road on one side and a meadow on the other. 这块地一边是一条主干道，另一边是一块草地。 place within certain limits;restrict • （边界内的）地方，限制 »freedom of action is bounded by law. 行动自由受法律的限制。
【IDIOMS】
◘ in bounds 1. inside the part of a sports field or court in which play is conducted • 在运动场地边线以内 ◘ out of bounds 1. (of a place) outside the limits of where one is permitted to be • 超出界限 »his kitchen was out of bounds to me at mealtimes. 用餐时间，我不得进他的厨房。 outside the part of a sports field or court in which play is conducted • 在运动场地以外 (figurative)beyond what is acceptable • [喻] 越轨，超出容忍限度 »Paul felt that this conversation was getting out of bounds. 鲍尔觉得这次谈话渐渐变得让人不能接受。
【语源】
1. Middle English (in the senses 'landmark' and 'borderland'): from Old French bodne, from medieval Latin bodina, earlier bùtina, of unknown ultimate originbound³ ◙ adjective 1. going or ready to go towards somewhere • 正在到…去的，准备到…去的 »an express train bound for Edinburgh. 一列去爱丁堡的快车。 »[incombination] the three moon-bound astronauts. 三名要去月球的飞行员。 (figurative)destined or very likely to have a specified experience • [喻] 准备就绪的 »they were bound for disaster. 他们为灾难做好了准备。
【语源】
1. Middle English boun (in the sense 'ready, dressed'), from Old Norse búinn, past participle of búa 'get ready'; the final -d is euphonic, or influenced by boundbound4 ◙ adjective 1. [incombination] restricted or confined to a specified place • 限制在某个场所的 »his job kept him city-bound. 他的工作把他困在城里了。 prevented from going somewhere or from operating normally by the specified conditions • 被…所限制的，被…所束缚的 »blizzard-bound Boston. 被暴风雪所困的波士顿。 2. [with infinitive] certain to be or to do or have something • 一定的，肯定会 »there is bound to be a change of plan. 计划肯定会有变动。 obliged by law, circumstances, or duty to do something • 有义务的，受约束的 »I'm bound to do what I can to help Sam. 我有义务帮助萨姆。 3. [incombination] (of a book) having a specified binding • （书）用封面包住的，装有封面的 »fine leather-bound books. 皮面精装的书。 4. (of a grammatical element) occurring only in combination with another form • （语法要素）黏附的 in Chomskyan linguistics, (of a reflexive, reciprocal, or other linguistic unit) dependent for its reference on another noun phrase in the same sentence • 依附性的（乔姆斯基语言学，反身代词、相互代词或其他语言学单位的所指要靠同一句话中的另外一个名词词组才能明确的）
【IDIOMS】
◘ bound up in 1. focusing on to the exclusion of all else • 热衷于，献身于，沉迷于 »she was too bound up in her own misery to care that other people were hurt. 她沉迷于自己的痛苦之中无法自拔，根本没去想别人是否受到伤害。 ◘ bound up with (或 in) 1. closely connected with or related to • 与…有密切关系的 »democracy is bound up with a measure of economic and social equality. 民主与经济和社会平等程度有着密切关系。 ◘ I'll be bound 1. used to emphasize that one is sure of something • 我敢肯定 »she's hatching more little plots, I'll be bound!. 我敢肯定她正在策划更多的小阴谋！。 ◘ I'm bound to say 1. used to precede a statement which one feels it is one's duty to make, however unwelcome it may be to the hearer • 我有责任说 »I'm bound to say that I have some doubts. 我有责任告诉大家我有些疑问。