a bilateral agreement between A and B
between 后接协议涉及的两个国家或双方；协议对双方都有约束力。
A bilateral agreement between the two countries was signed last week.
一项两国间的双边协议于上周签署。
两侧的；两边的；两侧对称的；双系的；双亲方的；有两边的；涉及双方的
involving or undertaken by two parties, such as two countries or groups
有两边的
Having two sides.
两侧对称的
having identical parts on each side of an axis
涉及双方的
Involving both sides equally.
双边的
affecting or undertaken by two parties
对双方都有约束力的
Binding on both of the two parties involved.
有两边的
having two sides or parts
具有双边对称的
Having bilateral symmetry.
涉及不分性别和家族的后代或祖先
Involving descent or ascent regardless of sex and side of the family (bilateral linearity).
The two countries signed a bilateral trade agreement to boost economic cooperation.
两国签署了一项双边贸易协定，以促进经济合作。
用法提示：bilateral 作为形容词，修饰 trade agreement，表示涉及双方的。
AI contextual example
Bilateral talks between the management and the union lasted for three days.
管理层与工会之间的双边会谈持续了三天。
用法提示：bilateral 修饰 talks，表示双方参与的讨论。
AI contextual example
A bilateral symmetry is common in many animals, including humans.
双侧对称在许多动物中很常见，包括人类。
用法提示：bilateral 修饰 symmetry，表示两侧对称的结构。
AI contextual example
between 后接协议涉及的两个国家或双方；协议对双方都有约束力。
A bilateral agreement between the two countries was signed last week.
一项两国间的双边协议于上周签署。
relations 常用复数；with 后接另一个国家或组织。
The president wants to improve bilateral relations with Japan.
总统希望改善与日本的双边关系。
talks 常用复数；on 后接会谈讨论的议题。
The two sides held bilateral talks on trade.
双方就贸易举行了双边会谈。
作表语时表示两侧都受影响，而不是只出现在一侧。
The hearing loss is bilateral and affects both ears.
听力损失是双侧的，影响双耳。
mutual强调相互性，常用于感情、利益等抽象关系；bilateral更正式，常用在政治、经济等正式协议。
reciprocal强调互换或对等，常用于贸易或关系；bilateral更通用。
two-sided更具体指物理上的两面或观点上的两面性；bilateral更抽象。
joint强调共同参与或拥有，常用于联合声明或项目；bilateral更侧重双方关系。
grammar · medium
易错句子The government made a bilateral decision to ban imports without consulting its partners.
正确表达The government made a unilateral decision to ban imports without consulting its partners.
bilateral 表示“双方共同做出的”，而句中只有一方行动且未咨询伙伴，与 without consulting its partners 矛盾；这里应用 unilateral（单方面的）。
grammar · medium
易错句子The two bilateral sides agreed to restart the talks.
正确表达The two sides agreed to restart the talks.
bilateral 本身已含“两边的、双方的”之意，不能再修饰 sides 说 bilateral sides；直接说 the two sides 即可，否则语义重复。
grammar · medium
易错句子They discussed bilateral cooperation among the two countries.
正确表达They discussed bilateral cooperation between the two countries.
bilateral 涉及两方，两方之间用 between；among 用于三者或三者以上，不能说 among the two countries。
与“双边的”相对，指仅涉及一方或一侧
bilateral 表示双方共同参与或对双方有约束力；unilateral 只由一方做出，不含另一方同意。
bilateral 只涉及两个主体；multilateral 涉及三个或更多国家或方面。
bilateral 泛指双方（国家、组织、团体等）；bipartisan 专指两个政党的，常见于美国政治语境。
双边协议
The two countries signed a bilateral agreement on trade.
两国签署了一项贸易双边协议。
双边贸易
Bilateral trade between the nations has grown significantly.
两国之间的双边贸易显著增长。
双边关系
The summit aimed to strengthen bilateral relations.
峰会的目的是加强双边关系。
双边会谈
They held bilateral talks on security issues.
他们就安全问题举行了双边会谈。
双边合作
The initiative promotes bilateral cooperation in education.
该倡议促进教育领域的双边合作。
adverb
noun
adjective
adjective
bi- (two) + later (side) + -al (adjective suffix)
bi- (two) + cycle (wheel)
later (side) + -al (adjective suffix)
uni- (one) + later (side) + -al
bi- (two) + lingual (tongue/language)
双边协议是常见搭配，指双方达成的正式约定。
双边关系指两个国家或团体之间的互动与联系。
双侧对称是生物学中描述身体对称的术语。
双边谈判涉及两个当事方。
双边条约是两个国家签署的正式协议。
双边协议
The two countries signed a bilateral agreement on trade.
两国签署了一项双边贸易协议。
双边贸易
Bilateral trade between the nations has increased significantly.
两国之间的双边贸易显著增加。
双边关系
They are working to improve bilateral relations.
他们正在努力改善双边关系。
Dictionary facts from ECDICT, WIKTIONARY.
双边条约
A bilateral treaty was ratified by both parliaments.
一项双边条约得到了两国议会的批准。