1
boundary between [noun] and [noun]
The river forms the boundary between the two countries.
这条河构成了两国之间的边界。
边界；分界线
先理解核心含义，再看它在真实句子里的用法。
边界；分界线
the line or plane indicating the limit or extent of something
The river forms the boundary between the two countries.
这条河构成了两国之间的边界。
两个区域之间的分界线或位置。
The dividing line or location between two areas.
表示某物极限或范围的线或面
the line or plane indicating the limit or extent of something
无形事物之间的界限、范围或限制(如个人舒适区、隐私或专业领域与外界之间)。
The bounds, confines, or limits between immaterial things (such as one’s comfort zone, privacy, or professional sphere and the realm beyond).
确定区域界限的线
a line determining the limits of an area
The river forms the boundary between the two countries.
这条河构成了两国之间的边界。
Please stay within the boundaries of the marked area.
请待在标记区域的范围之内。
Respecting personal boundaries is important in any relationship.
在任何关系中，尊重个人界限都很重要。
The river forms the boundary between the two countries.
这条河构成了两国之间的边界。
They marked the boundary of the park.
他们标出了公园的边界。
His behavior crossed a boundary.
他的行为越界了。
常用于心理学或人际关系语境。
It's important to set boundaries in a relationship.
在关系中设定界限很重要。
Not this
The river boundaries the two provinces.
Use this
The river forms the boundary between the two provinces.
学习者将名词"boundary"误用作动词。英语中"boundary"是名词，不能直接用作及物动词。
Not this
We need to respect each other's boundary.
Use this
We need to respect each other's boundaries.
"boundary"表示"界限"时为可数名词，通常使用复数形式（boundaries）来指代个人空间或规则的多重界限。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
边界线
The boundary line between the two countries was established in 1923.
两国之间的边界线于1923年确立。
边界条件
This equation has a unique solution under the given boundary conditions.
在给定的边界条件下，该方程有唯一解。
边界争端
The neighboring countries have a long-standing boundary dispute over the mountain range.
邻国之间长期存在关于山脉的边界争端。
…之间的分界线
There is a clear boundary between professional and personal life.
职业生活和个人生活之间有明确的界限。
界标
The hikers found an old boundary marker along the trail.
徒步旅行者在小径上发现了一个古老的界标。
边界层
The boundary layer of air near the surface affects wind patterns.
地表附近的空气边界层影响风型。
突破界限
This artist constantly pushes the boundaries of modern art.
这位艺术家不断突破现代艺术的界限。
跨越界限
Their friendship crossed cultural boundaries.
他们的友谊跨越了文化界限。
没有界限
Her kindness knows no boundaries.
她的善良没有界限。
Use boundary naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想'bound'（束缚）+ 'ary'（名词后缀），想象一条线束缚着一片区域，即为边界。
[object Object]
Words like 'found', 'round', and 'sound' share the 'ound' spelling and the same vowel /aʊ/ as the first syllable of 'boundary', but they are one syllable while 'boundary' is three, so they are not perfect rhymes. Words ending in '-ary' (e.g., 'dictionary', 'library', 'secretary') share the spelling but are pronounced with /ɛri/ at the end, whereas 'boundary' ends with /dɝi/ (the 'd' is part of the stem). Be careful not to confuse the pronunciation.
Dictionary facts from ECDICT, WIKTIONARY.