a. 清楚的, 明确的, 澄清的 adv. 清晰地 vt. 澄清, 清除障碍 vi. 放晴, 变清澈 n. 空隙
Science won’t give a clear-cut answer to the question of whether organic food is “better.” There are often trade-offs (权衡) and answers become less definitive depending on the product under consideration.
四级 · CET-4 2026年6月 第1套 · Part III 第46–50题
“Starting in late life is better than not starting at all, but starting in mid-life seems to offer a larger benefit.” K) Although it is not entirely clear why exercise helps put off or prevent Alzheimer’s, Knopman said it’s likely that exercise maintains good blood flow to the brain.
四级 · CET-4 2026年6月 第2套 · Part III 第36–45题
In the next three to five years, these studies should allow researchers to provide clearer recommendations for exercise and other lifestyle modifications that might reduce Alzheimer’s risk, such as sleep, diet and social activities, Fargo said.
四级 · CET-4 2026年6月 第2套 · Part III 第36–45题
But it’s already quite clear that exercising at any point in life is better for your brain than not exercising at all, Fargo added.
四级 · CET-4 2026年6月 第2套 · Part III 第36–45题
In a few years, researchers should be able to offer clearer advice on exercise and other lifestyle changes for reducing the incidence of Alzheimer’s.
四级 · CET-4 2026年6月 第2套 · Part III 第40题