- Double Eagle in the first transatlantic balloon, was greeted by avid crowds in France.
- By the nineteenth century, embroidery on men's clothing had virtually disappeared except for the occasional decorative vest and tie.
- The Salk vaccine is a major factor in the fight to eradicate polio.
- Comets are still regarded with awe by some people.
- The economy of Dallas, Texas, is strong and diversified .
- Although the Carbon 14 method of dating old objects is not foolproof , it is the best method available at present
- People who do not sleep enough tend to become irritable .
- One of the greatest breakthroughs for professional women came in 1973 when the field of banking opened up for them.
- Solid geometry has enabled astronomers to calculate the positions of the heavenly bodies relative to one another.
- Cream of tartar 酒石 , a weak acid, can be added to egg whites to help them foam泡沫 when they are beaten
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