但惠誉称,他们将对美国的信用一直保持观察直到八月底。
But Fitch also said it was keeping its us rating under review until the end of August.
驾车时,保持观察你四周的路况,每5 - 10秒钟观察一遍后视镜。
While driving along, keep checking traffic all around you and look in your mirrors every 5 to 10 seconds.
保持观察与聆听,直到你真的找到了有趣的东西可以拿来描述你的主题。
Keep looking and listening, until you honestly think you have discovered something interesting to say about the subject.
If you're an inertial observer, then in your system of reference, objects left at rest will remain at rest.
如果你是惯性观察者,那么在你的参考系内,静止的物体会保持静止
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