a dead reckoning的用法和样例：
- We now have a dead reckoning system (see prototype screenshot on Figure 2), named after the ancient naval navigation techniques used when the stars were not visible.
- I recoiled at seeing a dead cat on the road.
- It was cloudy; and the captain had to calculate our position by dead reckoning.
- The truck came to a dead stop out of the gate.
- The drunken man was a dead weight in my arms.
- I saw a dead bird in the garden.