Từ vựng

“Scientists raced to develop a viable vaccine before winter set in.”

“The phlebotomist had trouble locating a clear vein in the patient's forearm.”

“Black widow spiders neutralize insects using potent neurotoxic venom.”

“Vipers are highly venomous snakes native to dense woodlands.”

“A blocked blood vessel can obstruct healthy circulation to the brain.”

“Doctors recommend at least thirty minutes of vigorous exercise five days a week.”

“Oxygen supplies vital support to biological functions across all human organs.”

“The singer demonstrated impressive vocal range throughout the difficult opera.”

“Closing your vocal cords briefly creates a glottal sound.”