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"Solar power is a renewable energy source. "

"The teacher demarcated the different sections of the classroom for the art project. "

"My uncle is a computer for our family; he's always calculating budgets and costs. "

"The specified dress code for the party included a formal gown and black tie. "

"The program will run smoothly under these conditions: the computer has enough memory and the internet connection is stable. "

"The factory workers assembled the cars all day. "

"Her insightful analysis of the book helped me understand the main character's motivations much better. "

"The children woke up early to see the sunrise. "

"The different environments of the school, from the quiet library to the noisy playground, affect how students learn. "

"The fence clearly marks the boundaries between our yard and our neighbor's yard. "

"Construction is underway on the new bridge."

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