electrocardiogram

"The security guard's quick looking around the store helped him spot the shoplifter. "

"She gave a studied reply."

"I gave them a thumbs-up sign."

"The factory increased its output this year."

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

"My grandmother's heart is strong, despite her age. "

""Many students have problems understanding fractions." "

"Our apple tree produces a lot of fruit every summer. "

"The arrow descended in a curved line."

"If you still feel unwell tomorrow, see your doctor."

"The visual aids in the classroom helped the students understand the lesson better. "

"The doctor used an electrocardiograph to check my grandfather's heart rhythm. "