오늘의 영어단어 & Voca

"When an older adult descends a flight of stairs, for example, she may not tell the edge of one step from the next, so she stumbles."

"As adults age, vision deteriorates. One common type of decline is in contrast sensitivity."

"It is a chance fraught with real risks to America, Israel and our Sunni Arab allies: that Iran could eventually become a nuclear-armed state."

"We can ease the U.S.-Iran cold/hot war that has roiled the region for 36 years."

"In September 1996, I visited Iran. One of my most enduring memories of that trip was that in my hotel lobby there was a sign above the door proclaiming “Down With USA.”"

"Studies have shown that adults exposed to high levels of air pollution are more susceptible to premature death from pulmonary and cardiovascular disease."