| 单词 | 常改变 |
| 释义 | 〔blow〕To change one's opinion often on a matter; vacillate.反复无常，出尔反尔：经常改变对某事的意见；动摇〔intercurrent〕Occurring at the same time as and usually altering the course of another disease.并发的：和另一种病同时发生，并通常改变另外一种疾病的症状的〔unexceptionable〕Unexceptional and unexceptionable are sometimes confused. Unexceptionable is derived from the word exception in the sense "objection,” as in the idiomtake exception. Thusunexceptionable means "not open to any objection,” as inA judge's ethical standards should be unexceptionable. Unexceptional, in contrast, is related to the common sense of exception and generally means "not exceptional, not varying from the usual,” as inSome judges' ethical standards have unfortunately been unexceptional. Unexceptional 与 unexceptionable 有时被混淆了。 Unexceptionable 是由词 exception 引出的，有“反对”的意思， 如在成语take exception。 而unexceptionable 表示“不会有任何反对，” 如在A judge's ethical standards should be unexceptionable.（法官的伦理标准应该是无懈可击的）。 Unexceptional，相比之下，是有关 exception 的一般意义，通常表示“无例外的，不从通常改变的，" 如在Some judge's ethical standards have unfortunately been unexceptional.（某些法官的伦理标准不幸地是不容许有例外的） |
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