The problem with the flip-flop menu is the same issue we identified with flip-flop buttons in Chapter 21— namely that users can't tell if it is offering a choice or describing a state.
这种滚翻式菜单项的问题和我们在第21章中讨论的滚翻按钮的问题一样,使用者无法分辨它是提供一个选择,还是描述一个状态。
DT flip- flop is a new type of full- function flip- flop and it can more conveniently be transformed into D flip- flop or T flip- flop.
DT触发器是一种新型的全功能触发器,可以较方便地变换为D触发器和T触发器。
The parallel loading of the flip-flop can be synchronous (i. e., occurs with the clock pulse) or asynchronous (independent of the clock pulse) depending on the design of the shift register.
触发器的并行加载可以是同步的(即在时钟脉冲到达时发生)或异步的(不依赖于时钟),这取决于移位寄存器的设计。
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