ex-, 向外。-acerb, 尖，酸，词源同acid, acerbity.

1. The straight - chain alkanes exacerbate the problem of engine " knock ".

直链烷烃使机器的 “ 爆震 ” 问题更加严重.

2. Remedial action is always expensive and, in some cases, may actually exacerbate the problem.

补救工作总是代价很大,并且在某些时候反而会使问题更严重.

3. Do policies in industrial countries ease or exacerbate the difficulties faced by developing countries?

工业国的政策减轻还是加重了发展中国家面临的困难?

4. Chronic pain can exacerbate or prolong the function disability of the patients.

慢性疼痛可加重或延长脑外伤病人的功能残疾.

5. WMO says a warming climate can exacerbate air pollution.

世界气象组织说,气候变暖可能会加剧空气污染.