21世纪城市会议	Conference on Cities for the Twenty-first Century
21世纪妇女行动议程	Women’s Action Agenda 21
21世纪新地球项目	New Earth 21
21世纪环境与发展科学议程国际会议	International Conference on an Agenda of Science for Environment and Development into the 21st Century
21世纪生境对话	Habitat Dialogues for the 21st Century
21世纪的联合国奖	UN 21 Awards
21世纪的联合国系统	The United Nations in Development The United Nations System in the 21st Century
21世纪科学议程	science Agenda 21
21世纪统计促进发展伙伴关系	Partnership in Statistics for Development in the 21st Century
21世纪能力信托基金	Capacity 21 Trust Fund
21世纪能力方案	Capacity 21 Trust Fund Capacity 21
21世纪能力方案股	Capacity 21 Unit
21世纪议程
21世纪议程全球目标	global goal in Agenda 21
21世纪议程咨询小组	Advisory Team on Agenda 21
21世纪议程地方化方案	Localizing Agenda 21 Programme
21世纪议程对西亚经社会区域水综合管理的影响专家组会议	Expert Group Meeting on the Implications of Agenda 21 for Integrated Water Management in the ESCWA Region
21世纪议程的人类住区方案	Human Settlements Programme of Agenda 21
21世纪议程矩阵	matrix of Agenda 21
21世纪议程财务问题会议	Meeting on Financial Issues of Agenda 21
21世纪议程财政问题专家组会议	Expert Group Meeting on Financial Issues of Agenda 21
21世纪议程部门间协调组	Inter-Departmental Coordination Group on Agenda 21
21世纪项目	Project 21
21国集团	Group of 21
21日
2-1绞辘	luff tackle
2—1绞辘	luff tackle luff purchase rigging luff
2-1绞辘绞辘	luff purchase
2,2,4-三甲基戊烷	2,2,4-Trimethylpentane
225磺化聚苯乙烯阳离子交换树脂	Zeo-Karb 225
226羧酸阳离子交换树脂	Zeo-Karb 226
22-二氢豆甾醇	22-dihydrostigmasterol
2,2-二氢麦角甾醇	2,2-dihydroergosterol
22-二氢麦角甾醇	22-dihydroergosterol
2,2-二溴丙烷	bromacetol
2,2-二甲基丙二醇	pentaglycol
2,2-二甲基鸟嘌呤	2,2-dimthylguanine
2,2-二甲砜基丙烷	methonal
22日
2—2绞辘	two fold purchase
233	LOL
2,3-二巯基丙烷磺酸钠	unithiol sodium 2,3-dimercaptopropane sulfonate
2,3-二氢-1,3-茚二酮	indandione
2,3-二氢-1-茚酮	indanone indone
2,3-二氮杂萘	phehalazine
2,3-二氮杂萘酮	phthalazone
2,3-二甲基-2,3-丁二醇/频哪醇	pinacone tetramethyl ethylene ketone
2,3-二磷酸甘油酯	2,3-diphosphoglyceride,2,3-DPG
2,3-二磷酸甘油酸	2,3-diphosphoglyceric acid
2,3-二羟丁二酸/酒石酸	tartaric acid 2,3-dihydroxy succinic acid
普通话	English