Assertion: generation atomic clock | /r/HasProperty | based on a variety of different atoms
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Source sentences:
text: Meanwhile, NIST scientists have been developing next-generation atomic clocks based on a variety of different atoms, including mercury, aluminum, ytterbium, strontium and calcium.
text: Meanwhile, NIST scientists have been developing next-generation atomic clocks based on a variety of different atoms, including mercury, aluminum, ytterbium, strontium and calcium.