Context of Elusive

A new study brings scientists closer to an elusive goal: figuring out how to outsmart humans’ biological clocks to slow the aging process and keep people healthier, longer.

For decades, researchers have studied calorie restriction as a potential method of extending lifespan. Numerous promising trials, some dating back almost a century, have been conducted in animals—but the new study, published Feb. 9 in Nature Aging, is significant because it demonstrates that calorie restriction may also slow aging in humans.
—Time

Which of the following BEST interprets the meaning of “elusive” in the passage?

Related Topic

—Scientists Are Learning How to Reverse Aging | Video by TIME

留下评论

您的电子邮箱地址不会被公开。 必填项已用 * 标注