雙語暢銷書《艾倫圖靈傳》第8章:水銀延時線(31)
Nor was it planned out only at the logical level of circuit diagrams.
There were many pages also on the specific electronic equipment required. One section owed a direct debt to the Delilah, another unknown aspect of his expertise:
還有很多頁談到了需要的具體電子元件，有些是借鑑了黛麗拉的設計。圖靈在這方面其實具備大量的專業知識，只是一般人都不知道。Unit delay. The essential part of the unit delay is a network, designed to work out of a low impedance and into a high one.
延遲部件。延遲部件最基本的部分是一個網絡結構，用於處理阻抗。
The response at the output to a pulse at the input should preferably be of the form indicated in Fig. 50, i.e. there should be maximum response at time 1 μβ after the initiating pulse, and the response should be zero by a time 2μs after it, and should remain there.
該結構對於輸入脈衝的反饋，在理想情況下，應表現爲如圖50注所示的效果，即初始脈衝在1μs處取得峯值，在2μs處取得零點，並在之後的每個1μs的整數倍處取得零點。A simple circuit to obtain this effect is shown on Fig. 51a. differs from the ideal mainly in having its maximum too early.
具備這種效果的簡單電路，如圖51A所示……它與理想情形的差距在於，過早地取得了峯值。It can be improved at the expense of a less good zero at 2 μs by using less damping, i.e. reducing the 500 ohm resistor.
如果使用更小的阻尼，即可有所改善，但代價是在2μs處無法取得很好的零點。He also considered the practical requirements of the project as a whole:
他還從整體上考慮了這個項目的實踐需要：It is difficult to make suggestions about buildings owing to the great likelihood of the whole scheme expanding greatly in scope. There have been many possibilities that could helpfully have been incorporated, but which have been omitted owing to the necessity of drawing a line somewhere.
我很難給出關於具體建造的建議，因爲整個方案很可能還要再擴展，加入更多的特性，目前無法在這裏詳述。In a few years time however, when the machine has proved its worth, we shall certainly want to expand and include these other facilities, or more probably to include better ideas which will have been suggested in the working of the first model.
幾年內，如果這種機器確實能夠表現出應用價值，我們必然還會進行進一步的擴展，引入其它設備，或引入更新的想法。This suggests that whatever size of building is decided on we should leave room for building-on to it.
此外，該機器的實際建造規模，還要受制於我們能夠擁有的部署空間。
