The needle on the dial went right around to fifty feet, which was as far as it could go, and there it stuck.
刻度盘上的指针一下转到了50英尺处，即其所能达到的最大刻度，然后卡在了那里。
The needle jumped across the dial.
指针突然从刻度盘的一端跳到另一端。
She kept looking at the dial on the boiler. The needle had reached 250 degrees.
她一直看着锅炉上的刻度盘，指针已经到达250度。
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