dc
[ˌdi:'si:]
abbr.
da capo (Italian=again) （意大利语）又;
double column 双列的;
double-cylinder 双缸的;
double cap 双帽;
例句:
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The address is 2025 M Street, Northwest, Washington, DC, 20036.
地址为华盛顿特区，西北区，M大街2025号，邮政编码20036。
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They signed the rights away when they sold their idea to DC Comics.
他们在将点子出售给DC漫画公司时签字放弃了版权。
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The line AB cuts the line DC at the point E.
AB线和DC线在E点相交.
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It has been the mainstay for the DC area.
来自VOA
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There are some cases where DC grid is reasonable.
来自SA
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Five states and Washington DC allow same-sex marriages.
来自BBC