物理系统——一座建筑、一座桥梁、一辆汽车、一架飞行器、一艘轮船、或者一台计算机——存在于物理世界。
A physical system — a building, a bridge, a car, an aircraft, a ship, or a computer — exists in the physical world.
你将跟50个人谈话才能卖掉一座房子，一辆汽车，一台真空吸尘器，一份保单或者一个商业计划。
You'll talk to fifty people to sell one house, one car, one vacuum cleaner, one insurance policy, or a business idea.
在位于波兰托伦的哥白尼天文台工作的科学家Romuald Tylenda观测到了一组名为天蝎座v1309的双星。
A study by Romuald Tylenda of the Nicolaus Copernicus Astronomical Centre in Torun, Poland, observed a pair or stars, named v1309 Scorpii.
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