The fear of smallpox, which terrorized the eighteenth century, has no analogy(likeness) today.
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With lasers scientists can probe many physical processes, such as combustion, once beyond our ken.视野
MaryMcCarthyssatires讽刺文学arecouchedinaprosestylethathasaclassicprecision.
HowmanypeopleareawarethatadancerwiththeNewYorkCityBallettypicallywearsoutaminimumoftwohundredpairsoftoeshoesperyear?
Blue－green algae grow abundantly in salt marshes.
DoubleEagleinthefirsttransatlanticballoon,wasgreetedbyavidcrowdsinFrance.