n. a dull persistent (usually moderately intense) pain
v. have a desire for something or someone who is not present
v. be the source of pain
n. 疼痛
vi. 痛, 哀怜, 渴望
1. I have a headache, so I need to rest.
我头痛，所以我需要休息。
2. After the long run, my legs started to ache.
长时间跑步后，我的腿开始疼。
3. She felt a sharp ache in her back while lifting the box.
她在搬箱子时感到背部有一阵剧痛。