vanguard

"Solar power is a renewable energy source. "

"That laboratory researches topics at the forefront of technology."

"He reached for a weapon that was on the table."

"The school's new banner, featuring the school mascot, was unfurled at the football game. "

"She was carrying a heavy backpack to school. "

"Scientists study plants to understand how they grow. "

"They lodged a protest with the authorities."

"I saw a movement in that grass on the hill."

"continuous firing leads the grooves of a rifle."

"The library offered an extension on the due date for the overdue books. "

"The research station that houses Wang and his team is outside Lijiang, a city of about 1.2 million people."

"Russia is a large country.   The fruit-fly has large eyes for its body size.   He has a large collection of stamps."