| 词汇 | or |
| 词根词缀 | 词源： c.1200, from O.E. conj. oþþe "either, or," related to O.N. eða, O.H.G. odar, Ger. oder, Goth. aiþþau "or." This was extended in early M.E. with an -r ending, perhaps by analogy of other "choice between alternative" words that ended this way (either, whether), then reduced to oþþr, at first in unstressed situations (commonly thus in Northern and Midlands Eng. by 1300), and finally reduced to or, though other survived in this sense until 16c. The contraction took place in the second term of an alternative, such as either ... or, a common construction in O.E., where both words originally were oþþe (see nor). 词根记忆： conj.或,或者(表示选择);即,大约;否则The maximum plus or minus the minimum makes minute difference.最大值加上或者减去最小值只产生极小的差异. |
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