Don't expect telecoms to beat down the doors for dark pulse lasers, however, said Purdue University's Andrew Weiner, an expert on ultra-fast optics.
然而，美国普渡大学的超高速光学专家安德鲁·韦纳说，不要指望电信业者会为暗激光器敞开大门。
The future is dark, yet Lauren stays cheerful and Patrick has a quiet confidence that he'll beat the disease.
未来是暗淡的，但劳伦保持着安静乐观的心态，帕特里克也十分有信心战胜疾病。
We had just made it up the precipitous cliff by the channel mouth when the day became dark, and raindrops the size of hailstones began to beat down to the accompaniment of a howling wind.
山路愈陡愈狭，我们刚到了峡口悬崖之上，周围一下昏暗起来，雹子大的雨点随着狂风猛扑而下。
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