dumbbells

"Muscle consists largely of actin and myosin filaments."

"Instruction will be provided on how to handle difficult customers."

"strengthen a muscle"

"The stupid at the meeting kept interrupting the presenter. "

"He assembled the model ship."

"The weight of the textbooks in my backpack felt heavy. "

"They carried an assortment of gardening implements in the truck."

"He listened carefully to his mother's concerns, feeling sorrowful about her disappointment. "

"She trained seven hours a day to prepare for the Olympics."

"The project consists of three main parts. "

"The student placed her textbooks on the bookshelf after class. "

"The heavy box on one side of the scale was counterpoised by an equal weight of books on the other, bringing the scale into balance. "