If you're the least bit fuzzed by jet lag, your ability to think and react will be impaired.
就算时差只让你稍微有点晕，你的思考和反应能力也会削弱。
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One way to increase the efficiency of a high-bypass jet engine is to turn the fan into an open rotor, a bit like returning to propellers, but using two rings of stubby counter-rotating blades.
The ground already contains quite a bit of jet fuel leaked from older hydrant pipe systems that was not detected by the existing SCADA instrumentation.