1.Bohr's unposted letter was written in response to Heisenberg's apologia .
玻尔针对森伯的辩解写下了这封发出的信。
2.Heisenberg's uncertainty principle, according to which nature is inherently indeterministic, implies an open future (and, for that matter, an open past).
3.The best clocks now scan a one-hertz-wide sweet spot to find its exact center, plus or minus one millihertz, in every single measurement—despite the Heisenberg limits.