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.
Canyon Lake: Sunrise on the Lake, Canyon Lake, CA. Canyon Lake: Canyon Lake, Riverside County, California. Canyon Lake: Railroad Canyon Dam built in 1927 enclosing Canyon Lake. Canyon Lake: Canyon Lake North of the Causeway, Wintertime. Canyon Lake: The shadow of Goat Hill falls over Canyon Lake California. Canyon Lake: Evening in Canyon Lake, from North Causeway.