今日要点:
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device programmer(设备编程器)和 digital signal processor(数字信号处理器)
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情态动词(上)
device programmer(设备编程器)
A tool for programming non-volatile memories and other electrically-programmable devices. Typically, the programmable device is inserted into a socket on the device programmer and the contents of a memory buffer are then transferred into it.
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a tool for doint sth: 用来做某事的工具
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non-volatile['nʌnˌvɒlətaɪl] memories: 非易失性存储器
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typically: 副词,典型地
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be inserted into sw: 被插入到哪里
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the contents of: ....的内容
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be transferred into sw: 被传输到哪里
一种用来对非易失性存储器和其他电可编程设备进行编程的工具。典型地,可编程设备被插到设备编程器的接口上,接着内存缓存器中的内容被传送到它里面。
digital signal processor(数字信号处理器)
A device that is similar to a microprocessor, except that the internal CPU has been optimized for use in applications involving discrete-time signal processing. In addition to standard microprocessor instructions, DSPs usually support a set of complex instructions to perform common signal-processing computations DSP families are TI"s 320Cxx and Motorola"s 5600x series.
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be similar to: 与...类似
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microprocessor: 微处理器
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has been optimized for use in sth(doing sth): 现在完成时时态,并且具有被动语态,已经被优化后,用于某事(或做某事).
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involving discrete-time signal processing 动名词做定语修饰application,涉及离散信号处理
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in addition to: 除...之外(叠加意思)
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to support sb to do sth: 支持...做某事
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common: 常用的,普通的,一般的
一种类似于微处理器的的设备,不同的是它内部的CPU被优化,用于特定的应用,如离散信号处理。除了标准的微处理器指令外,DSP常常支持复杂指令集去非常快地完成通用的信号处理计算。通用DSP家庭是TI的320Cxx和Motorola的5600x系列。
今日语法小知识: 情态动词(Modal verbs) 上
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情态动词(Modal verbs)本身有一定的词义,表示语气的单词
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情态动词不能独立的做谓语,只能和动词原形一起构成谓语
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情态动词用在行为动词前,表示说话人对这一动作或状态的看法或主观设想
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情态动词虽然数量不多,但用途广泛,主要有下列: can (could), may (might), must, need, ought to, dare (dared), shall (should), will (would) must not.
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情态动词无人称和数的变化
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否定式构成是在情态动词后面加 "not"
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个别情态动词有现在式和过去式两种(见4,例如can(could))
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情态动词属于不及物动词范畴,因此没有被动语态