sub

英[sʌb]美[sʌb]

n.
1.潜水艇
2.代用品，代替者，替补队员
3.（向俱乐部等定期交纳的）会员费
4.审校员；助理编辑
v.[T]
1.做替身，做替补队员
2.审校(文稿)

同：	[n.] cuban sandwich, grinder, pigboat, submarine [v.] fill in, stand in, substitute

The normative sub-branch of microeconomics is known as welfare economics.
微观经济学的规范的分支学科被称为福利经济学。收藏
The committee is comprised of three sub-committees with different areas of responsibilities.
该委员会由三个分会组成，他们各司其职。收藏
Marginal head: Headings or sub-headings arranged to appear in the margin for easy reference.
栏外标题:排在书页白边上的标题或副标题,它方便参考.收藏
Many sub-tropical and tropical fruits can withstand this treatment.
许多亚热带和热带水果能经受这种处理。收藏
Eskers are very long ridges apparently formed when sub-glacial streams or rivers deposited sedimentary materials
蛇形丘显然是冰下河溪的沉积物堆积而成的很长的垄岗。收藏

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a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States
[同] cuban sandwich, grinder, hero, hero sandwich, hoagie, hoagy, italian sandwich, bomber, poor boy, sub, submarine, submarine sandwich, torpedo, wedge, zep
a submersible warship usually armed with torpedoes
[同] pigboat, sub, submarine, u-boat

be a substitute
- The young teacher had to substitute for the sick colleague
- The skim milk substitutes for cream--we are on a strict diet
[同] fill in, stand in, sub, substitute

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