Presently it occurred to Tom that maybe Huck might come this very night and give the signal.

汤姆忽然想到，也许哈克今晚就会来发出信号。

youdao

No signal came that night.

那天晚上没有信号。

youdao

Any motorist driving along a country road at night must stop every mile and send up a rocket signal, wait 10 minutes for the road to be cleared of livestock, and continue.

任何在晚上沿著乡间道路开车的驾驶人，每英里就要停下车来施放火箭信号、等待10分钟让路上的家畜被清空后继续驾车前进。

youdao

Some 65, 000 fans will still pack Signal Iduna Park on Wednesday night, and 11, 000 of them will still join together to turn the south stand into a wall of yellow and black.

WSJ: Borussa Dortmund Dismayed by G?tze's Transfer to Bayern Munich

Slowing down light may have many practical uses in communications, signal processing, television displays and night-vision devices.

BBC: A Bose-Einstein condensate: It slows down light

First, researchers at QinetiQ, a British-government-owned company, and Ludwig Maximilian University, in Munich, Germany, exchanged keys between two alpine mountain-tops more than 23km apart, though they did so at night, when sunlight could not confuse the signal.

ECONOMIST: Optical communications: Cutting the cable | The