| 单词 | 时间长度 |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔attention span〕The length of time during which a person can concentrate or focus attention on a particular object or idea without diversion.注意广度：某人能够将注意力集中于某一特定物体或思想而毫不走神的时间长度美国传统〔remembrance〕The length of time over which one's memory extends.记忆期：某人记忆延伸的时间长度美国传统〔speed〕The length of time required or permitted for a camera shutter to open and admit light.暴光的时间：照相机快门打开并让光线进入所需的或能允许的时间长度美国传统 |
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