They think, Okay, so I know an egg  weighs 20 grams.. But the sentence is not just saying it weighs 20  grams. It says it weighs 20 grams AND half an egg. If you read it  backwards, you would understand. Let's try, An egg weighs half an  egg and 20 grams.. Two halves make one.
Diamond Valley Lake lies between two mountains in California's Inland Empire tourism region. The 4,500-acre lake is Southern California's newest and largest reservoir. It has only been at full pond since 2002 and already has been crowned the Jewel of California lakes, with a reputation for excellent fishing.
Grass Valley, which was originally known as Boston Ravine and later officially named Centerville, dates from the California Gold Rush, as does nearby Nevada City. When a post office was established in 1851, it was renamed Grass Valley the following year for unknown reasons.The town incorporated in 1860.rass Valley is the location of the Empire Mine and North Star Mine, two of the richest mines in California.